Is this a, I have a money tree kind of project ? If so I would do the 2JZ first, then the RB26, both with programable. If this is a limited funds deal I would either do the 7mgte with stock EFI(parts cars are cheap) , and later upgrade the turbo or L28 with SDS, T4, and big injectors. The 1JZ is nice but not really much cheaper than the first 2. You still need the wiring and computer. You could get a front clip but then the price goes way up and you could do any of the others for about the same. Fully modded 7M's make about the same as 1JZ's.