Opinions needed on 72 to 75 D100 or W100 Dodge Truck

Part time has manual locking hubs on the front axle. Full time the front axle is always locked in.
They have leaf springs front and rear.
72-4 part timers have the NP 205 transfer case. Bullet proof gear driven case and is divorced from the tranny . In 75 they went to the gear driven 203 case and is married to the tranny.
Trannys are the TF727 auto and the NP 435/445 4-speeds. /6 might have the TF904 auto.
In the mid 70's the 833 4-speed overdrive was available for the D100