Dodge made the small A series trucks using the van front and wheelbases, so there was an A-100. That's the small pickup sized one. The bigger ones were a tilt cab and I believe were called the L series. IIRC there was an L-600 and L700, sort of a bigger version of the A series. These really didn't have very much interior room, and were mostly used for local delivery stuff. I sat in one and it was very tight. Much less room than you'd expect from a medium size truck. In the early 70's Dodge also had a "Big Horn" which was a full semi sized rig with a long hood. Interestingly enough, it used the same roof as the regular pickups to save money. Kind of gave it a funky look. Big body, small cab. Pretty good trucks from what I hear, but not real big sellers. There are a couple good Dodge truck books out there. Take a peek on Amazon.com and you can usually pick up a used version cheap. If I had the room, I'd have a couple truck projects, especially a car hauler/ramp back. Have fun researching!
TP