I have wiseco OTS I believe there 2618, zero piston slap and I'm at 21,000 on the motor, Manley rods w/ 625 bolts.
Piston technology has come a long way, 2618's can run almost as tight a clearance as stock, wisceo specs .0015 a far cry from the 3 to 4 thou that was recommended 15-20 years ago...