Building for Torque Porting Question

[Ol' Ron]

I made a mistake on the 81A head. I think it was the 81s head which is sometimes called the 'Denver head" I learn allot after building many engines and sometimes I get mixed up on just what I did. But I will stand by the piston to head clearance as being a very good mod. As it improves drivability as well as economy, for very little cash.