Easy use, no tow/haul/major hills?

Mazda 5 speed, from behind 300/302 in F150.

Harder use, tow/haul etc, ZF from behind 300/351w in F250.

4 speed OD? Big gap 2nd to 3rd. Top shift or Single Rail boxes are aluminum and considered weak. Bearing issues. OD weak.

Domestic Truck Tranny Guide