OK, so B.Green's your original question of what tires to replace your 205/60R15's with aligns with what I am trying to fit on my 1969T with 15x6 deep Fuchs so instead of sleeping last night I started to compile a spread sheet with info mostly from tire rack. This google doc is editable so if others have
15x6" tire solutions please feel free to add.
Please note- The criteria I used is for
summer only street/track use so I only placed tires that fit that criteria. Snow tires, 16"/17"18" tires, DOT R compound, truck tires, and low speed donuts can be compiled on some other list by someone else
Hope this helps out.
Spreadsheet- Tire Options 15x6" Fuchs (1969 911T OEM tire size 185/70R15)