1950 truck chassis swap
The D150 is a Full Size
Dakota is Mid Size
D50 is a Mini pickup
Most 1930's - 1953 Dodge Trucks run a 108" Wheelbase (excluding special ordered ones with a 9' Bed, Utility Bed, etc or the WM300 & M37 Military Power Wagons), the closest match for that wheelbase in a Dodge Truck is a Ramcharger (106" Wheelbase) or a 1st Gen D50 (109" Wheelbase)