66 and back had a lower spline count (18 i think) and 67 up had a 23 spline count. Don't quote me on those numbers, but its close. So yes, he could use the converter as long as he uses the correct flexplate or weights on the converter.

Last edited by KingTuna; 04/15/16 12:38 PM.
2014 Ram 1500 Pentastar V6
1966 Fury II 4 door