I believe you just need the next generation truck V8 to standard trans bellhousing, 55 to ? You can swap in the 54 crossmember that has the motor mounts you need. I know there are kits for the V8 side mounts. Check all the truck vendors ie. Chevs of 40s, Jim Carter etc. The other issue is clearance re. steering box. Some I've heard have moved the box outboard and or use special exhaust manifold. I'm sure others will be along to chime in on this.
Best of luck

Last edited by JiMerit Boltr#43; 02/02/2012 9:47 PM.
It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed