A 1.687 ch piston would put it at zero on the deck height.
Keith black makes a 1.658 that's about the closest I can find. The standard is like 1.720 IIRC
Yes, a 1.687 pin height is zero deck.
I'll have to check with KB. Obviously, I missed that one when I was going through the catalog. I did call and received a response that they did not have anything that would work and were not interested in making a custom.
