Digger,
You’ll be better off calling JE and having them make you a set. I just got through building a #’s matching 1967 L-88 427 and luckily it was a virgin block with a std. bore and I Looked for 2 months for a set of pistons for it and came up with nothing. I found lots of junk Std. pistons with bad skirts, screwed up ring lands, and domes that looked like hand grenades were thrown at them. There’s a guy on ebay that has .030 over pistons I can find his name if you want to go .030 over.
The .030 over pistons are easy to find.
lil-gene.