Pump gas or race fuel?

I did.
I think there was justifyable scepticism at that number. I just dont see an almost 12 to 1 engine with an under 300 advertised cam, and iron heads, running on pump gas.
E 85, oh yeah!

Right. I've just been through all the calculations for TWO engines very recently and I thought his numbers were too big a spread. Mine was 9.98 static and 7.92 dynamic. That was the milled head slant six I am installing now and the closed chamber head engine on the stand came out to almost the same. I was thinkin over 11:1 satic and 7.4 dynamic was a stretch. Possible I guess, but questionable.