That was on my '63. rearend narrowed 1" each side from OEM spec, regular 15x8 Ramcharger steelies, 4.5 BS.
Springs were in stock location, ESPOs with +1" ride height.
Still a tight fit with 285/70s, a size which I think has been discontinued; 255/70s had plenty of room.

I think you have my old '65 Bel2, don't you?
White, gold int, 318 TF AC & guillotine PW...