Muncie Mainshaft - 32 Spline - Lightened

New Muncie 4 speed mainshaft for 32 spline applications.  Fits years 1970 to 1974. This is rifle drilled to remove rotating mass and has improved oil slots for 2nd and 3rd speed gears. Uses stock hubs and reverse gears to stay 100 percent compatible with your existing parts.Super accurate machine tolerances. Replaces aftermarket part number WT297-2G and General Motors part number 3978759