Without re-reading, I believe the op wants to keep his 3-on-the-tree and change the rearend for an upgrade to higher gears.


RonR


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1964 CJ5