Here's what's PLANNED for my mitsu bobtailed flatbed (after I finished my FJ40 project):
1.)Cadillac 4.5lit aluminum roller cam block with 4.1lit slugs and liners(free and less strain on the drivtrain), ported 4.5l heads, dual plane TBI manifold, custom headers.
2.)S-10 Blazer 5-speed and NP transfer case, correct driver's side front driveshaft or S-10 blazer auto + NP transfer case.
3.)Stock axles already have 4.625 gears with 32" skinnys, so i'll spring for the rear ARB.
4.)Replace the dented and rusty cab with a fresh junkyard one that is Durabak'd.

The other option was to put in a Mopar 318/727/203 with Toyota LC axles and SAS under the truck but I decided to just put it all under a Fj40 trail beater instead.