I just got a tranny off a 52 3/4 t GMC. From the case numbers 591953 according to the novak site this is a muncie sm420. I'd like to mate it up to my 46 1/2t chevy 216. I think it will fit but I wanted to ask the experts. Also, the tranny is set up for a torque tube with a 10 spline universal out back. I haven't taken the TT off the 46 but do you know it the 46 has a 10 spline shaft before I waste an afternoon?

Thanks.
Rick.....