I'm restoring a 1972 FJ40 (production date 12/71) and I'm trying to keep it as original as possible. I'm guessing the original radio was AM only? I can't seem to locate an OEM radio - all i've been able to find is '73 and after. Will that radio fit? What are my options for an OEM look that will fit without mods to existing opening - I'd like to have AM and FM? Where were original speakers? Thanks!