I put together an L72 a few years back just as the factory would have, just to see how it would stack up...I had to remove just the slightest material from the deck/heads to clean 'em up, and when I cc'd it, it still came in at only 10.2:1 compression. I've heard of a similar rebuild on a Berger L72 that came in at 9.8:1 compression. Anyway, I ran a mix of premium and race gas, until the car was really sluggish at the track one night...I went with straight Premium after that and never had a problem. Thing went 12.7s @ 108+ in our heavy car, and coulda went quicker had I knew then what I know now.
Now, our current 12:1 L72 is a different story...
