Hi Jay . . . the arithmetic on the bore and stroke mods is straight forward - call it a 230 CID (3.53 x 3.9375). I don't think I have ever seen a CFM rating published on a Carter WCD - it can't be more then 130 or 140. But the head is the limiting factor on this build.
Hi-Torque is Chevrolet branding for a bored & stroked stovebolt engine introduced in '41 for trucks (the original 235). The same engine was re-purposed in '50 on the Powerglide cars (because the automatic transmission slipped - wasting horsepower and torque. So they needed to provide more.). The crank I am using is an NOS GM part for a PG car:
Inliners BB post circa '06 regards,
stock49
