This is what I installed in my latest 318 project.Looks like rumblefish360 and I are on the same page. Grind # CRS 268H-10
Comp Part# 20-212-2 Gross lift both intake and exhaust .454
Duration at .050 is 218 I and 218 E
Lobe separation 110
Put it in a 63 Belvedere for a fun cruiser.Plenty of power and sounds good too.
