Found out I have an 833 hemi passion overdrive trans. With the 18 spline input and 30 output. 2.66, 1.59, 1.00, and .80 gears. Rebuilt a 742 center section with 391s to replace the old 741. Put a set of 28” Mt et street Rs on a ten inch rim. Works great on the street and down the hwy. 70 mph at just under 2500 rpms.