The pistons I ordered are TA custom ones, but use .030" Mopar 440 rings. At least I think so since the ring package said they are .030" over bore for my .038" over Buick.
Mopar 440: 4.320"+.030"= 4.35"
Buick 455: 4.312"+.038"= 4.35"
Mopar 440: 4.320"+.030"= 4.35"
Buick 455: 4.312"+.038"= 4.35"
Comment