right now i have stock turbo, afe, 4", star wheel spun a good bit and 370 diamond b's, stock timing i would say that i picked up maybe 40hp. when i intstalled them i had to bump up my idle b/c once i put it in gear it would drop to 400rpms and try to stumble. right now i have a bad miss at 2700 rpms. it misses bad when holding it to the floor and backing out it starts to buck. i think when i advance the timing it will help alot. egts get to about 1050 and turbo will spool to 35lbs max.
bad, i can see you are in need of some 370's you can do the install if you have hand tools a dually lug nut a 1" piece of 1" pvc. took me about 3 1/2hours (drop a socket down the intercooler tube... ..... don't ask). the 2nd time will go much faster.