Once upon a time, I rebuilt a 396 big block Chevy L78 engine. Original in my '68 El Camino. This engine came stock with a solid lifter cam, 11:1 pistons, rectangular port heads, a Holley carb, etc. Realizing 11:1 is a no go with modern gas, led me down a path towards a strong, but streetable build. I tried hard to fit Isky parts into this build, but it seemed their BB cams were all quite aggressive...or weak. I wanted something in the middle, but Isky didn't have what I wanted. I did buy valve springs from them. My last Isky purchase...