360 vs 440 79 coachman

Not a motorhome but I pulled the 318 out of my 1976 dodge van and built a very nice 360 for it back around 1980. It tow great and this was a heavy I beam car trailer. Inside the conversion van was lots of wood, refrigerator, sink, and bed.

View attachment 1716196949
Was this a maxi? It's hard to tell from the angle, I don't think they had them in 76, but I could be wrong, I had a heavy B250 maxi, use to load it up with 7800 lbs of news print grocery flyers then go delivered them to kids to delivery door to door, it had a magnum in it, it's was a complete dog loaded, (it had the v6, lol)