What aluminum is used on the door frames, ribs, etc.?
Working on my 1972 Argosy and noticed that a part of frame work to the door, or maybe a threshold piece, has a small crack in it. I'll figure out where it goes when i put it back together. Anyway, I asked my welder friend if he could weld it, and he wanted to know specifically what aluminum it is. I know that the belly pan is 5052 and the exterior skins are 2024T3. Just wondering specifically what aluminum was used in the door jambs, trim, threshold, etc. pieces. Also, just kind of curious in general what was used for the ribs and any other structural parts of the shell, besides the skins? Thanks!