hello.... Felpro-(sterling part# 980P) is a LPG(liquid propane) piston...9.3 cr( milling head .090 will give you 10.8,and decking block .030 will give you over 11/1 CR-thats high-just stay away from high RPM with these cast pistons and stock rods..still cast ...good up to 6000 rpm.....can use stock rod-2" Comp height- if you do anything else, you will spend $1200+ less shipping for forged pistons and alum. rods.....it starts to change what you spend,but look what you END UP WITH-LOTS OF 292 TORQUE.....
Lee