360 heads on a 318 LA

In the early 70 models, yes, chambers run larger. But when you look at late 70, all 80's castings, they are very close cc wise. Only the 302 heads run much smaller. I just milled my 308 heads .030 and stuck them on my 318. Cranking compression was a laugh at 125 psi, yet the darn thing made more power everywhere it seemed.