An LS1 piston for stock LS1 rods has a slightly higher deck height at 1.34 than the one you referenced earlier. With a 6" rod that puts you at 9.105, which is within decking range. Although those JE pistons were 100 apiece sold individually, which is what you guys were quoting for custom pistons, so maybe you aren't buying yourselves anything here.

"The first rule of overkill: You can never have too much overkill."
"Overkill is underrated."