Do you know how much piston to head clearances you have across the tops of the pistons? If not, you should :scope : I use to believe that the old adage of .035 minimum with steel rods was good until I found out ii isn't I like and use .040 minimum now with steel rod motors
Still don't have the rod to measure but they should be .020 in the hole and .040 head gasket, so should have .060.
Use some strips of modeling clay to make sure 1/4 inch thick by 1/4 inch wide laid across the piston valve reliefs and maybe some (2) laid across the piston tops front to rear also
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
I like and use .040 minimum now with steel rod motors 
