Maybe an S-10 frame? I know its not exactly flat, but the wheelbase should be close. Dad and I measured one and it was just right for a '50 F1 we were working with. We had started swapping a 350/350 onto the frame, but the parents hit hard times and he had to sell the project.

The portion thats raised doesn't seem like too big of a deal... our plan was to channel the bed down onto it. Theres nothing much to the bed but a square frame with 3 or 4 braces that run laterally across the bottom, which can easily be raised. You'll lose about half a foot of bed depth, but since you're going to run air ride anyway you can use that space to hide plumbing etc. Not to mention that fitting air ride to an S-10 is probably a bolt-on affair since its the most popular minitruck .

I did a google search and found these threads...

S-10 frame swap thread on the HAMB:
http://www.jalopyjournal.com/forum/s...d.php?t=274702

Some dude's step-by-step guide for S-10 frame on an F-1:
http://www.geocities.com/lakota_circ...cer/swap1.html







His photos are not the best, but you get the idea.