I've got a 727 in my 68 Barracuda behind a built 408, been a good trans for years but has never shifted right. Supposed to have a shift kit in it, barks the tires once in a while but usually pretty tame/mushy between gears. The trans shop that rebuilt it said that the lever on the trans should be all the way to the rear at WOT, and it is. I think I got hosed on the shift kit, any suggestions?