Originally Posted by KILLER"B"468
Wat? I never had to taper the walls on mine. I had 2.25I 1.88E On my .060 454. I know you are running a BBC but what is the final bore and what block.
It's a 70's block w/ final bore of 4.310. The Heads are 990's w/ the bigger 118 combustion chamber. The valves most likley wont hit but it's better safe than sorry....