My memory has failed me - who is/was the man in New York who rebuilt Cad Lasalle transmissions for dragsters and such?
You can also try Mark Shepard in Connecticut, 321 Bozrah Street, route 163, Bozrah, Connecticut 06334-1435. Cell phone # 1-860-859-3450. Mark is a serious craftsman. He used to do many conversions to shorten Cad / Lasalle transmissions.