Chrysler did some testing in the '70's between a 727 and 904 transmissions in drag racing. With everything else being equal, including converter specs, a 904 was about .15 seconds faster in the 1/4 mile than a 727.

Nice thing about a 904 is that you can get a 2.74 low gear from a later 904/988/999 even if it's a lock-up trans.

Last edited by Locomotion; 11/22/20 03:19 PM.