Originally Posted By JohnRR
Originally Posted By cudaman1969
NHRA piston guide,
69 440- .027 below deck
70 440. .051 below deck
71. 440 .051
72. 440 .123 below deck

67 440 .059
68 same as 69


NHRA specs are not ACTUAL FACTORY and should not be used as a guide for any spec that is Factory as delivered mopar related.

So they just pulled those numbers out of the hat? Whitch one do you think is wrong?
Just did the NHRA allowed pistons, 68-71 use same piston but show different ch? Should have checked what head gasket they allowed.

Last edited by cudaman1969; 12/13/16 07:56 PM.