I just recently finished up my Alltrac work as far as getting it running and back on the road. Here's the basics:
Gen 3 engine with drop in head studs and 272 cams.
Street Brawler with Precision 5130 turbo.
1200cc low z injectors
walbro 450 pump
on 15psi pump gas it put down right under 300awhp (297 iirc STD corrected)
on 18psi (current set up) it did 327awhp (STD corrected)
I've been daily driving it for the past 2 weeks like this and it is loads of fun. Look at the dyno chart below and you'll see when boost came in, etc. This was in 3rd gear I believe. 6psi @ 3000 rpm, 16 psi @ 3500 rpm, 18psi @ 4000 rpm and holds it steady to red line.
1st gear you better have your hand on the shifter as soon as you hit boost basically, cuz it's not going to take long to hit the rev limiter.
For EMS we have an adapter board in stock ECU case with Link G4x, so its mounted with stock brackets in stock location under dash (PITA to remove, but I've gotten better at it...).
Kris is my brother so now that there's an alltrac in the family that's running / driving hopefully we can answer more questions you guys have as they arise! This was a project he had since 2006 but never was able to get to (2 man operation just limits how much you can get done on cars when orders pile up). Here's that dyno sheet:
She is flex fuel capable and we do plan to put in some E85 and tune it eventually on that too, just have a lot going on at the moment