Nah! Just good measurements.
Pulled out what I wrote on a pice of paper when I did it on my 454 .030 over
57.55+.216+.275+.795+5.98 64.18
________________________= _____ = 8.92:1 w/ flat top 2 valve relief
.216+.275+.795+5.98 7.266
So we had to greatly improve on the last rebuild!
DAHH! forgot to give you the formula.
Cylinder volume+cleaance volume+piston volume+head gasket volume+chamber volume
________________________________________________________________
Clearance volume+piston volume+head gasket volume+chamber volume
Sorry