Yes but the newer engines are running very different roller cam profiles and some darned high compression ratios, with good spark control to stay out of detonation. A very different animal. Trust me: No 9:1 LA with flat lifter cam is gonna run 200 psi numbers..... unless the cam is way too small and the SCR is up past 11 or 12:1.... or the lifters and/or cam lobes are all screwed up and not lifting the valves like they should.
