. . . , I think 5" wide is too narrow for ride and handling purposes, but I don't know. Finally, any recommendations on radial tire size to match the rims would be appreciated.
Check the width of the LT radial tire that Cletis posted. That width of a 15" radial LT tire will have an original-looking profile and will provide excellent ride ad handling (noticeably better than the old bias-ply tires).
Speed you money and time on making sure that all front-end, suspension, and steering parts are tight, properly adjusted and lubricated.
I have LT 7.0 x 15" radial tires on original 1954 15" rims and they look original (high profile) and drive great.
