sounds like you got a lot of money invested. do you have to upgrade your full lines, can you use stock toyota fuel lines? and can you use a 3core v6 toyota radiator.
Stock fuel pump and lines work for an unmodified 4.3 CPI/TPI. If your running a TBI you will need a 15 psi pump inline and disconnect (electricly) the Toyota EFI pump.
I put my computer in the glove. I am running electric fans in my CPI, but my original clutch fan works also. I used the downey manual for wiring and the ECU pinout for the computer. The Downey manual is mainly for the TBI/TPI, and the CPI is a little different. I bought a VSS from JTR (smog legal). I also used the 700R4 adapter to my Toyota case. I also ran the stock S-10 radiator with few problems.