I was very impressed with the article and the numbers they pulled from the low compression engine. I have a set of 516 heads with big valves in them and was wondering if the MP porting templates are still available? My porting won't be on par with theirs, but I would love to try and duplicate that engine, only using the larger of the Summit cams and a Performer RPM intake instead of the 509 and single plane intake. As an after thought, I have a set of 906 heads set up with Crane springs. I don't think I will give up much compression using them with .020 gaskets. Perhaps with minimal port work they would be a better alternative?