From Dodge Wiki

Chrysler's AB platform was a Truck Automobile platform created in 1971. It was mainly used for full-size Van. AB vehicles have used two Wheelbase: 109.3 in and 127.2 in.

Models:

• 1971-1980 Dodge Sportsman
• 1971-1980 Dodge Tradesman
• 1971-1972 Fargo Van (Canada only)
• 1974-1983 Plymouth Voyager
• 1981-2003 Dodge Ram Van
• 1981-2003 Dodge Ram Wagon