'73 up drum to disc conversion track width change

Hey guys, just to confirm, did chrysler change the track width of drum brake cars in '73 when they went to the single piston slider calipers? I'm going to convert my '76 to disc this winter, and I was just wondering if the wheels will be pushed out even further than they are now. here's my car, 100% OEM stock with stock 5.5" wide SBP rallyes...195/70 on the front, 215/70 on the rear.

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