vissiajs

I have a 408 stroker. Gmpp can that dynoed 489 HP. And 520 tq with stock 317 heads. Stock headers. I just about have all my mpfi set IP. My builder dynoed my engine with a 800 cgm rockchester carb with edelbrock rpm manifold. Which I told him I was going mpfi. I know I need better headers. I'm sitting at 10.16-1 compression right now. Going n/a and is going to be a d.d/ off road being its going in a lifted 92 Silverado 4x4 with nv4500 trans. Should I get my 317 port and polished or different heads. Trying to keep the cost reasonable

MonmouthCtyLS7

iTrader: (6)

Your choking that thing up big time with those stock heads. Get some AI or TF's

A.R. Shale Targa

iTrader: (2)

Advanced Inductions has a 232cc CNC program that they can do to your 317
heads for between 1000 and 1200 bucks which will free up a good 40 or so
more horsepower. Total Engine Airflow also has real nice CNC programs