Torque Converter Install

Are you sure you did'nt get a small spline converter by mistake.(changed spline diameter on 904 during 66 model year) I think the 3001 model is year ones small spline & 3002 would be what you should have. The proper converter should go right on & be recessed.You might also have some burrs on the spline preventing it from sliding on properly . Just some thoughts & good luck.

Oldschoolcuda