bottom line - ATI said the same thing... i'd burn up any trans / converter if i tried this.... you know what? they were wrong!
I called Dynamic and ordered a 9.5" converter built to my specs. I HAD a mopar 2500 converter in it before - 3.23's and a 2500 mopar converter, that acted like, well what you guys were saying, sloppy, and no mpg. I've had this setup for 4 years and over 7000 miles now...
I swapped and I am here to tell you that was the best thing I ever did to my car.
The efficient 9.5" dynamic GAINED me 2 mpg over the 2500 mopar converter,
the cruising RPM at 50 mph also increased 400 rpm - THAT is efficient UNDER the 3800 RATED stall - i was crusing around 2200 at 50 now compared to 2600 -
I went from 12.80 to 12.56 at the track for my best ET's - and 1.87 to 1.74 60' times improved as well.
there was NO area the old, 30 year old technology was better then the new dynamic 9.5" -
when you say i would be faster with 4.88's your probably right, but I wanted a driver as well as a drag car, and I can do 75 mph with this car for hours on end, and I do, and still get 16 mpg.
Alot of you guys still are stuck in the past with the way of thinking converter wise, Its a shame because there is alot of new technology you are missing the boat on!
sign up and read this - its an issue Of Mopar Enthusiast Magazine - they let you read the issue FREE online, but you still have to " subscribe"
http://editions.amospublishing.com/MPRE/default.aspx?d=20080401