Well guys here are the specs on the engine.
351CJ block w/4v open chamber heads,bored 40 over
SRP cast aluminum pistons w/chrome moly rings. Ring gaps top ring .020 second ring .022, oil ring .022.
piston pins fitted to .0008-.0009
Piston to valve clearance Int. .260 Exh .325
Piston to head clearance: head gasket thickness .051; Piston deck height .005
for a total clearance of .056
Rings are JE Pro Seal rings
The cam is an Isky280-Mega hydraulic cam.
Cam Lift .323; Valve lift .565; Duration 280; duration @.050 232 with a lobe center of 108
Harlan Sharp roller rockers, Holly intake with a 650 holly dp