Just for clarification, you are asking about how to do this on the '51 3100 with a '55 235/floor mounted 3-speed that is showing in your signature line???
Confirmation will help others provide the answers you seek.
Dan
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
