Thanks Randy, and Jack yes it is 406 chevy smblock, stock bottom end four bolt, its a soft block, only cause that is what was laying around at the time of the buildup, also 202 fuelies, that have been with me now for some 35 years, 7/16 screw in studs, roller rockers, flycut spring pockets for 1.8 spring diameter, mild port (bowls) unshrouded valves, manley street valves, unilite dist, edelbrock RPM, holley 670, sig erson gear drive, really dated but does build power for all it needs.