Biggest tire on Stock 67-69 Dart

Just giving an update. I was able to fit 275/60/15s under it, with just a home made 1/2 relocation of the springs. The wheel are 15x7's with a 5" backspace.

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I'm going through the same decision process on my 67 GTS, stock 8 3/4, stock disc/drum brakes, SS springs. I want to go with steel wheels 15x7, 4" backspace... with largest tires in stock wheel wells/location that allow good drivability(not rubbing). Do you think you could've fit the 255 60 15s without moving the spring in, with 4 inch backspace? When I measured, it looked like it would be tight but good.

Also what did you put up front?

Do you have a good side profile pic?

Thanks!!! Mine currently has junk roller 225 70 14s on it. IMG-5135.JPG