http://www.rosspistons.com/products/index.php#cid=7&acc_id=0&type_id=2&vehicle_id=40

Stock stroke, .030" over, .990" pin...part number 99501
CHIP

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax