47-55.1 1951 GMC Floor High Hump

[leegreen]

Your '52 shift linkage bolts to bellhousing or the clutch linkage does?
The '52 3 speed column linkage should work with any 3 speed trans, give a or take a little adjustment to the rod lengths

the 64 292 bell should bolt to any gm manual trans from a truck, or from a car with a centering ring since the car trans has smaller flange circle

The '52 clutch is setup differently, but you should be able to take the '64 clutch linkage including the frame bracket and transplant it to the '52 frame, weld an arm onto it and make up a rod to connect to the '52 pedal.

the '64 clutch linkage looks like this

weld on a new arm like shown

the '52 like this (or similar, i think this is a car)

make a longer rod to connect to the new arm you welded to the 64 linkage

I could be wrong but this is what I remember being the usual way to stick a newer engine, usually a 283 v8 into an AD. There must be pictures somewhere of old school open driveline swaps keeping AD clutch pedal

3.08 seems like tall gears for a '64 half ton.
Don't consider swapping the '64 frame under the AD, it wont fit and an s10 would be a way better swap these days. Stick with your plan to upgrade motor and some maintenance, get it on the road again.