Too high rpm - overdrive? Keisler?

I don't see a Viper T56 available for a Mopar. I know Keisler has a 6 speed but they have no answered my email yet ... and it's been a week.

There's a good thread on the viper tranny in an A body right here :

http://www.bigblockdart.com/forum/showthread.php?3985-T-56-6-speed-discussion...updated-06-28-09


I WISH I could afford a viper tranny. Heck Im not afraid to cut it up.