I used a shelf mahle 1.12ch piston with metric rings and a
6.7 scat 2.2 rod with 440source 4.25 crankshaft.
Lighter piston and longer rod win/win. Pistons were only 453 grams.
This piston is for the 4.15 stroke but with the longer rod only ends up .010 farther in the hole, which was perfect after decking the block .020.