305 AFR too small for 509cid?
I could get a quite good deal out of 305 AFR heads. They are with CNC bowl blend and chambers option and with 2.25/1.88 valves. My bracket race only engine is 509cid Gen V BBC (4.5x4.0), 272/278 @ 0.050 cam with .700lift. I will keep the engine below 7200rpm. Compression is about 12.4:1.
Question: How much horsepower am I leaving to the table comparing to 325 or 345 AFR:s with CNC bowl blend and chamers option? The 325/345 are the same, only intake runner is bigger and with 2.300 valves and I read that the exhaust valve is better flowing too on the 325/345 heads.
I will not pay about 700$ more for the full CNC 315/335/357 heads. I think best bang for the buck is the CNC bowl blend and chambers options.