Going to look at 74 D100 tomorrow. It is a regular cab long bed with the under bed box. Was a 440 truck but has a 318 now. Has the 8 3/4 under it. Been off the road for a few years. Cab is solid - only rust is some on the outer rockers. Bed sides have been repaired before and bed floor has a few spots on it. I should be able to get this truck for a fair price which I figure is worth it with all the good parts. Too bad the 440 is gone but I don't know how rare they are or how hard to get parts for the bed (door is missing for the box on the side of the bed). Appreciate any advice when I go to look at it as I have had mostly newer dodges.