Measured a 72 350 2 barrel block today. Never been decked, still factory stamps on deck surface. Measured at 10.23. The generally accepted spec is 10.187 So a difference of .043" Just FYI
My 68 blk is 10.214 average. .002 taper from frt to rear. My 71 blk is 10.218. Both are uncut deck measurements. Did not check taper. Steve, what did you find for taper?