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I've built them both and wouldn't use either in a race application because of the gear ratio's, converter choices, parasitic drag and/or weight. Street use is fine.

The 545 comes in with a dry weight of a 175lbs and the 722.6 right around the same weight as a 727.

I run a 545 in my truck and rebuild it every 100 passes or if and when the clutches burn up before that.



The 518 weighs a big 147.. what a 727.. its got to
be right at a 100 lbs or a bit more... I know the
OD and tail shaft assembly feel pretty heavy




I took a bare 727, 904, 833 iron case, T56 and a 722.6 and weighed them side by side a few years ago. If my memory serves me right the 722.6 was within a few pounds of the 727. + or - I can't remember but I do believe heavier and a 115lbs rings a bell but I'd have to check my old notes to be sure. My memory just has to remember where I put them now.

Jerry Williams.