jay d
The GM Muncie OD has similar shift components that can be used in the early trucks
Since neither of the vehicles you cited came with anything close to a Saganaw 3 speed overdrive
you will need to modify and/or fabricate the shift levers and arms.
Check with member Robert Cranston. He has a 49 GMC with a Saganaw w/OD trans in it.
Fred

1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine