[77 TRASHCAN]

I was really glad when Jim Hand changed to 6X heads on his wagon engine, although he was wanting to keep using his 64's, but ran into a problem with them (I think... Jim?).
His heads are/were 6X-4's with modifications detailed in his book. I am sure he performed all the modifications he wanted, then had them milled to the chamber size he desired for his specific chamber size/compression ratio, I believe was 10:1. I truly like his way of doing things. Most of his parts were salvage yard available, and spending money where it was needed the most, valve train and other essentials...