IIRC, the one with parking brake is not going to have a "park" on the 727 VB rooster comb thus the parking brake on the tail shaft.

there is another 727 with short shaft bolt on yoke that is for a large chassis and has a trans mount further back and bolt spacing wider.

the smaller RV chassis 727 short shaft with bolt on yoke has the same trams mount location/bolt spacing and can be used in cars/trucks with a drive shaft change to a splined slip yoke.

what you have will need a tear down with tail housing/output shaft change and a parking pawl rod installed (maybe a VB change?)

if you put it in the truck with the parking drum you just need to chop up a drive shaft and add the correct size spline/slip yoke like the bolt on yoke trans use.

then figure out the shifter hook up or trans plant the dash shifter.

what size u-joint is on it?

large 1330 3 5/8" across the cups?

they do have a baster joint that goes 1330 to 7260 so any mopar truck 4x4 spline/yoke could be used on the shaft and a baster joint at the park drum/yoke