54 3100
. . original (to the truck) 4 speed transmission . .
- torque-tube rear-end and SM420 with u-joint cover?
. . if I used a 55 - 62 truck 4 speed transmission . .
- open driveshaft with open u-joint (SM420)?
Both of the above have a u-joint yoke that is bolted to the transmission and the other u-joint yoke slides on the driveshaft spline.
. . The rear-end has a fixed pinion yoke and the rear of the transmission has a fixed yoke, so "where is the slip yoke"? . .
- what transmission and rear end (drive shaft?) are you referring to? Maybe a few photos might be helpful.
All 1954 3100 Chevrolet trucks are "short bed" (and "step side", for that matter). Why would a two piece driveshaft be needed?
I know nothing about drive-shafts, but the people posting above are very knowledgeable. With more information about the transmission and rear end, you will get the best answers possible.