Originally Posted By EV2Bird
Look like old grey forged trw-s or such, id have to guess your .005 isnt enough, more like .008-.009 or better.

Those skirts are not like the newer TRW and speed Pro forged 440 pistons, they looklike the original forged 426 M.W TRW pistons shruggy
Did you gap the rings and deburr the ring ends? If not you should have tsk If you did then those scratches maybe from junk suck into the cylinders and got stuck between the top of the pistons above the ring lands and cylinder walls scope

Last edited by Cab_Burge; 01/27/19 08:46 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)