340 .040 over pistons for Zero Deck...Where to find?

I like DSS pistons...1.802" CH

http://www.dssracing.com/6300X_p/6300x.htm

They're in the hole .020" by the math, but you can shave that off the deck.

There's also Ross pistons, and I bet Diamond makes a couple great sets.

EDIT: 1.70-1.74" CH would put you in the hole by .060-.100" depending on where your deck height is...