TTI makes ev gearboxes with 27 spline shafts, same as GM PG and Turbo 350 transmissions so many conversions can use their existing yoke, if it is in good condition. We also make a bolt on (fixed) yoke with 32 splines similar to a GM Th400 output spline, in this case the yoke is modified with our sealing system so the yoke usually needs to be supplied by us. Call (623 755 8214) or email (info@torquetrends.com) our tech department with any yoke questions.