Gee, I thought "14.4 @98 , with a terrible 60ft" being identical to my 1970 Swinger 340 back in 1971,.... was pretty good for 3.55s.
The problem is trapping in third gear with an automatic is like 4700rpm. Whereas my Swinger had a 4 speed and trapped at 6200 in third gear.
So Ima thinking your engine is boogying pretty good..... with those handicaps
BTW;In my transmission stash, I have a low-mileage 1965 273 904 core, and also have the skills to rebuild it. It still has the factory B&T rear flange on it. I've been saving for you since about 1975. Also have some newer slip yoke types.
