gee, you changed the suspension (which should hook much better) and a converter with 1200 RPM more stall? well, that's an apples to kumquats comparison. to be fair, you really should have run the 727 with the same or comparable converter on the old suspension.

I'm guessing the majority of the 60' time improvement it due to the converter and suspension, not the tranny itself.

put cal-tracks and a 4k stall converter on the 46RE, I bet it would have sped up about the same.