13:1 Compression Pistons in 340 Small Block

GEO said
I'd personally buy new pistons and buy modern heads and get rid of the 1970's technology stuff

Explain how that piston is so obsolete compared to a piston from today, with the same pin height and dome volume.

If you are paying attention, they aren't that much heavier, have a standard ring package and the skirt design is actually pretty damn good.

It's not nearly as obsolete as some of you seem to think it is.