It's more work than it's worth, Just get a trans that will bolt up to the cummings.
Even though you spelled "Cummins" wrong, you are correct.
If you have the 3.08's in that thing, an overdrive is going to really up your fuel mileage. The Parents had a new '90 with 3.08's/727 and that thing did 16 mpg no problem. WIth overdrive it would have easily done 20+.
What Dodge was thinking when they run a Diesel engine at 2300 rpm I will never know. Almost as bad as them putting 3.73's in the 3rd Gens.
And then sent leaflets through the Cummins Shops stating "RUN HARD" with a picture of tach needle going past 2000 rpm to "get the best fuel economy". Good thing their Customer base was clueless about what rpm a diesel should run at, and they fell for it.
Then added MORE fuel with the common-rail..............FFS's............great idea, Dummies.
1964Polara: what kind of fuel mileage are you getting right now? US gals?
