I actually have a governor that was fabbed to replicate a max wedge governor, I need to
swap the 5:1 hemi kickdown lever for a 4.2 version I have.

I have a 741 chunk with a clutch style SG and 3.91 gears, but the gears and bearings are making a hell of a racket. I have a access to a 489 chunk with 4.10 gears and a Detroit locker. I may need a conversion joint to make it work