Category Archives: F-100

Gearbox Crossmember

With the motor sat on it’s mounts, I needed to sort the gearbox mount out so that it wasnt balanced on a piece of angle iron wedged under there. It also needs to be able to move backward for the 4L80-E so after a lot of lying under there and looking at it I decided to make the mount sit on top of the old Camaro rails and bolt through as this would give me the most room for an exhaust.

Crossmember

My mate John had given me some box section to make it out of, and I set about making the centre section and working back. The mount bolt is not long enough to go through the 2×1″ box section I was using, so I decided to copy the OEM mount and cut a hole big enough for a socket to go in on the bottom. With that done, I worked out the angle for the 2×2″ box and hacksawed it to fit. After the fourth cut I was wishing I had space for a bandsaw in the garage. I tacked it together, then made the two 2×1 arms and bolted it all in place and jacked it up till I had the gearbox where I wanted it on the level. I could then measure up for the two “feet” and after a quick test fit seam welded everything then cut all the ends to match the angles of the uprights. No one will see it, but I want it to look OK. Not much to it really but I’m pleased with my self.

Gearbox Crossmember

Firewall and Engine Mockup

I’ve been slowly plodding on with the mountain of metalwork on the truck, and wanted to get the front end back on out of the way. I decided to get the firewall partially welded in while I could get at it easily so stripped the intake manfold off and taped it all up ready to work on it. After a bit of hammering I tacked it in then went back over it and filled in the gaps.I really need to get some cleco fasteners it would have been a million times easier and a lot better.

Firewall Tacked

I won a Corvette intake manifold on ebay to replace the truck manifold and make the turbo install a bit easier with the lack of EGR to block up. It’s also better at high revs which is where the turbos will be happy, and a lot better to look at. I couldn’t resist getting the turbos out and mocking it up to get an idea of how it will look. They’ll sit a lot further forward than in the pic, and the left hand one will be clocked round to face the intake. Plenty of space at the moment but I’m sure it’ll end up a lot more cramped by the time it’s on the road.

Holy Guacamole

Plenty of Space

I clamped all the bits of the firewall recess in place, and pulled the hood off to check I had plenty of clearance for the motor. I decided to join the top two halves together first so cut a piece of sheet metal that was long enough to allow me a bit of lattitude when I put the bottom two pieces on. I tacked the top edge first and gradually bent and hammered it into shape as I worked down the seam.

Firewall Back Together

With it in the right shape, I clamped it back in place and decided on how far down I wanted the bottom edges to be. I cut a template from cardboard and transferred it to sheet metal before working my way slowly along the edges. It was a lot harder to keep it all in line so I needed to hammer it as I went. I did the same for the other side and then started to slowly fill the gaps in between the tacks. With it all done a quick test fit and it needed some shaping to clear bellhousing. I started to shape a bulge in it to give me enough clearance in case I go to a 4L80E when the 4L60E blows up. I was out of time then so called it a day.

Motor Clearance

Plenty of Metalwork to Do

I’ve been working on the roof and hood for a few weeks now, and have got rid of the worst of the creases and dents. I’m slowly getting the hang of getting the metal smooth again afterwards but it’s a real struggle to do. The hood had a deep crease in it that I couldn’t get behind to knock out, so ended up welding washers to the crease and slide hammering it out. The peak in the front is so far gone I gave up and started to make a new one. I also sliced the door up and bent it to fit the frame as it was way out, and am in the process of re-doing a lot of the patchwork where the roof has been chopped and not very well put back together.

Hoodley Creaseworthy

I’d also cut the original firewall recess out to set the engine back further, and kept it to cut up and make a new one. After a bit of measuring, I chopped it into four pieces and trimmed the firewall a bit further to get it all to sit where I wanted. I couldn’t get the hood off to check the clearance as it was pouring with rain and I had nowhere to put it with the Bel Air in the garage as well. If it’s all OK, and it certainly looks that way, I’ll tack it in and make up the filler pieces then pull it back out to finish it off. I plan to smooth the rest of the firewall when the cab is off the chassis and I’ve worked out what I’m doing with the steering column and pedals.

Firewall Sectioned

Engine Mounts Done

I wanted to get the engine mounted properly and work out how much of the firewall needed removing to get it to fit. I decided to just cut a big square out of it and re-make it later as the existing bulge was too far down to use. I have a spare 4L60-E with a snapped off tailshaft housing so I bolted that on to the block to hold the back of the engine up when it’s on proper mounts. With that done, I hung it roughly in position on the crane and started measuring. With the tailshaft dead centre between the rails, the engine looked visually off centre and I just could not get it to sit right.

Motor-and-Box.jpg

I ended up with it sat as close as I could without cutting the sump or crossmember, and cut pieces of box section and some tube to fit. I dropped it onto the new mounts, checked everything again and after a bit of shaping was happy. I scraped around the edges so that I could put them back in the same place and lifted it back off the mounts. With some supports welded on, I dropped it back into position then tacked them in place. Next day the engine came back out, and I welded them in all the way around. I also realised that it looked so bad visually as the core support crossmember was way out of line. It was nearly an inch out horizontally and vertically, so I cut off the one side and carefully lined it all back up before welding it in again. The motor then went back in and all the front sheetmetal on and I was done for the day. At worst I may have to slot the core support holes to get it all to fit, but at least its straight now.

Engine-Mount.jpg

More Hammering

I spent last weekend working on the hood again, and got the crossmember out so that I could repair the dents and the crossmember itself. It was pretty much beyond repairing nicely as it was crushed and snapped so I hammered and bent it to as close to correct as I could and tacked it back together. I think I’ll end up having to make a new one but it’ll do for now. I also got the worst of the dents out on the drivers side. The front lip was buckled and split so I got it back as best I could with a prybar and lump hammer. At that point I called it quits for the weekend.

Hood Getting Better

The plan for this weekend was to try and get the edges straight so that it would fit before I carried on with the dents. The hood edge is pretty much dead straight where it meets the wings, so I clamped a piece of box section to it as a guide and set about it with the hammers. With it striaght I could see how bad the front edge was, about an inch too high and the inner crossmember was bent that much too. That took a lot of hammering, clamping and levering to get it back where it should be. I tacked it all up and test fitted it and it looks pretty good so far. Still needs plenty of work, but getting there.

Hood Edge

The Hood Lives to Fight Another Day

I had a few more hours working on the truck on Saturday, and spent the time on the roof again. I wanted to try and get a small area of it as smooth as I could so I can tell if I’m going in the right direction. I spent ages gently hammering with a planishing hammer and it seems to be getting smoother. It will need a lot more to finish but I’m hoping to get away with as little filler as possible rather than hiding it.

Tommo.jpg

I also wanted to get the hood out of the shed and back on out of the way. I had made a start on a lot of the really bad dents but had been told that it was beyond economic repair to do it properly. I’d had no luck finding a replacement as yet, so I laid it down on the garage floor and had another go at it to see if I thought I could do it myself. After a lot more bending and hammering I think I can fix it myself. There are only two really bad parts left on it now, both of which are behind the crossmembers. The plan is to pull them out and get the hood back into shape then repair the crossmembers. It sits pretty well now, and I have so much space around the engine it’s ridiculous.

Hood-round-two.jpg

Making a Start

The last of the panels for the truck were on the drive when I got home the other day, so I had everything but the hood shoved in the garage (that had to go in the shed for now). After discovering the gearbox was dead on the ’55 on Saturday I decided to do some work on the truck instead on sunday. I hung the front wings and the majority of the front loosely so that I can still push it in and out and it’s out of the way as the roof is now well and truly full of truck panels. I had two front valance panels, one was full of holes and the other was bent like a banana. I got the worst of the dents out so I could use it for now and bolted it up.

Front Hung

I decided to make a start on some of the bodywork, and the doors had been bugging me. They were a completely different shape to the openings at the back, and I wanted to work out if I could fix it in the door or if I’d have to re-do the chop. After making a few slices with a hacksaw I had enough movement to pull it in so I’ll weld that up when I can get the ’55 out of the way. With that done I felt like doing some more hammering, so made a start on the roof. It was really badly warped where it had been chopped, and had about an inch of filler in it when I fist got the truck. I spent a few hours with the hammer and dollies and got it loads better. It needs a few days work or so I reckon to get it good enough, so that’s something to look forward to.

Roof Started

Truck Comes Home

With the garage cleaned out to make space for it to live in, I got the truck dropped back home. I had the new engine sat on a stand so needed to sit it between the rails temporarily on some wooden blocks to make space for the truck. With the motor being a truck motor it has a very deep pan which I wanted to keep if possible. It also made it a pain to get over the rail and into the firewall recess, but after a lot of messing about in the rain it dropped in. The adapter plates were miles away from the Camaro mounts so I decided to dump them and make new mounts to go onto the plates. After a lot of messing about trying to get the old mounts off I got the grinder out and chopped the bolts off and shoved some wood blocks in to hold it still for now.

Engine-in-For-Now.jpg

It needs to come back a few inches as you can see in the pic, but I plan to take the manifold off, get a box on there and set the angle before I worry too much about the firewall recess. The truck manifold is ugly as sin, but a swap to a LS1/LS6 manifold means new accessories which I’d like to avoid. I did think of using an Edelbrock Victor Jr manifold with an elbow for the throttle body but I’d rather spend the money on forged pistons and rods than a manifold that wont gain me anything over what I have. I’m hoping to make a start on cutting the factory loom down in the evenings so I’m ready to go with that when I’m out of things to do on the ’55. Sadly that’s got to the point where it needs lots of things bought for it rather than lots of work so it’s slowed down a bit. It’ll be out and about soon tho, can’t wait.

Tucked-in-Safe.jpg

Starting to Collect Parts

I’ve been keeping an eye out for the various bits I need for the F100 and with the engine plans one of those is a decent strong axle. I found a 12 bolt axle with hardened shafts and C clip eliminators that was a few inches narrower than the one under there which suited me perfectly. I’d bought a 12 bolt posi to replace the one in the Camaro only to find it was a 10 bolt under there so it’s sat in the box ever since. I also had a bearing and seal kit spare so just a few more bits and I should have a nice strong axle.

12-bolt.jpg

I’d also been looking for a pair of turbos for the motor. My plan was to get a cheap pair initially and step up to some decent ones once it was all up and running. Well that was the plan anyway. I spotted a pair of brand new water and oil cooled Garretts for sale on eurodragster from the same guy I’d bought the 144 supercharged engine for the ’55 from. I gave him a ring and they turned out to be hige, way bigger than I’d planned to use, but after a bit of bartering we came up with a price I couldn’t say no to. The majority of the boost will end up going to waste initially but I will have massive potential with this setup and some serious bottom end work on the motor. There goes the idea of doing it all sensibly.

BigTurbo.jpg