68 Dart first time out
Sounds like there is a lot of tuning or potential left in the car then with a little work.
Actually they dynoed with a Holley 850 douple pumper that I kept on the car for awile. Changing to the 770 just made the car drive the street so much better and didn't seam to give up much if any at the track.
I was going to change convertor but when I told manufacture I had the gear vendor o/d they really backed off on the the looseness of what I needed making me second guess the investment. The existing convertor came from Pro Trans in Lancaster about 6 years ago. It's a $350 unit, they were probably given motor info at that time. I'm guessing Probably just a off the self mild performance type unit.