Ok starting to gather parts for my next EFI project. currently I have a vortec 350 in my toyota bored .030, GMPP vortec heads, 9.8 compression, vortec rpm airgap intake, holley 650dp carb, and a comp cams extream energy 4x4 280hr. the speed shop that built it said it should be capable of pushing 380 - 400 HP. so far I've collected up a 454 TB with 85# injectors, a 16168625, holley BB TBI to squarebore adapter, and a pile of wires. I also have the original vortec intake with factory spider assembly and most of the wiring less pcm.

So my questions are:

which route would be better?
can the 8625 run that spider?
what would the pro's and con's be?
would one make more power than the other?
should I look at a tpi setup with a vortec base?