Project Performance Upgrade II underway!!! (Page 1/1) bjm362 NOV 02, 03:26 PM OK, I have my '88 Fiero GT with a Cadillac 4500 V8 and a 440T4 4 speed AOD transmission. When I got it, that V8 was probably making about the same HP as the original V6. The first efforts at upgrading performance were simple, and went well. I fixed some minor problems it had, removed the 2 barrel Holley that had been adapted in and replaced it with a 450 CFM 4 barrel. Then I adjusted the shift points and feel. That all definitely woke things up a bit! I felt like that resulted in about a 40 HP gain to around 175, but now it is time to try and make a bigger jump! I am shooting for close to 300 HP. I have ordered a 4.9. I am planning to have some 614 casting (Closed combustion chamber) heads opened up, ported, polished and get oversized valves installed and later rocker arms (1.6 to 1 ratio rather than 1.5). I ordered a cam from Delta Camshafts. I already have a modified for higher flow intake manifold, as well as a modern improved design 625 CFM carb. Oh, and if 300 ponies doesn't run fast enough, I bought a Nitrous Express ML 1000 kit! Spadesluck NOV 06, 09:22 AM I have a 4.9 caddy motor sitting in my donor car waiting on me as well. I have all the allante stuff sitting in the garage ready to swap and I was going to do the delta cam. Keep us posted on how the progress is going with pictures.