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The one in my 1974 360 Roadrunner weighs about 135lbs. I just want to know why Chrysler made theirs out of cast iron instead of aluminum like GM.



Ma did make 'em in all-aluminum versions for A- and F-bodies.

I thought only the Muncie M-22(?) trans was all aluminum. The 4-speed in my Dad's '68 was definitely all cast-iron.