ok guy's this is some numbers on the heads
Intake Runner 180cc Chamber 58cc
Valve Sizes/Length 2.020"/1.600"
Intake Port Test Data @28" of water
.100 .200 .300 .400 .500 .600 .700
72 154 208 254 271 274 276
Exhaust Port Test Data @28" of water
.100 .200 .300 .400 .500 .600 .700
60 121 159 184 193 199 202
so tell me what you'll think about the numbers?
Look pretty nice by those numbers. Very close to AFR 185s. I think the 185s flow a tad more on the Intake runner, but the Pro-Toplines do a little better on the exhaust side.