727 rebuild vs 904

Hi we have a 727 reverse Manuel valve body hooked to a moser dana 60 with 4.30 gears and a some what high stall.

Question is this trans handled 10.50's all day not getting hot no burned fluid but the stall is high. Should we just try to do a converter swap on this one and some day rear gears? Or will a 904 handle this kind of big block power on the street and strip?

Goal here is to have the car run well on the street and the strip. more street then strip.
P.s. I don't mind the manuel shifting. thanks
Author: motasupra