J heads, compression, and today's crappy gas

I did run a 10-1 / 360 on 93 years back. The fuel was E-10 then as it is today. I’m sure the formula has changed on the gasoline since it’s been a good long while. But yea, I did 93 & a 10-1 engine. OH, the cam was a purple 292/.508.

Edit… If I was doing this today, to be honest, I’d opt for a 9.5-1 and no less than a 9.0-1 with the cam you mention.