You could also get a 6 cylinder 6DR5 Diesel (factory option) in 1977-79 Ramchargers, Traildusters and Trucks.
I have a 76 Ramcharger, with 77 Macho Ramcharger graphics/stripes. 318 / 435 4 speed / 203. Converted it to early 74 frameless style doors, with 72-75 metal door panels and a 72-73 Grille.
Have the full top for it, a half top and a soft top. Factory Rollbar and Spare Tire carrier. Also have a vintage brush guard/push bar for it, and a few other rare parts for it