#920 vs. #675 Heads "Compression vs. Cylinder Flow"

69 Cuda 440 said

I meant, Factory Cast Pistons

Sorry About That.... 'Cast Iron'..... :banghead:

Valve Seat Angles.
Intake...... 60* ~ 45* ~ 37* {Top Dress 20*}
Exhaust.... 60* ~ 45* ~ 30* {Top Dress 15*}

Click to expand...

I knew that's what you meant. Thanks again.