well the shop that is building it got some patroit heads for it and said they finished and they called me back and telling me the heads are not goin work like they said would and now want me to get another 350(vortex os some bs) and put everything in it so im and the motor has been with them for 4 months and they have just been sitting on it so im goin to pull it out and finish it my self.
The AFR 227's are the best flowing head on the market untouched, however they are built for more of a supercharged/turbo charged application. If your just doing a 383 naturally aspirated you could easily get away with AFR 210's, auto or manual car ?
id be more worried about your bottom end. dont want to spin a bearing or anything
1994 Firebird Formula- Stock LT1, No trans- T56 Swap in progress, Moser Ford 9inch 3.70s, Chromoly Driveshaft, BMR UCA/LCAs, K&N Intake, Trickflow Intake Elbow, A/C Delete, and Corbeau Forza Seats
1998 Bonneville SE- for sale.