Anyone using 15x6 front and 15x8 rear wheels. 74 dart sport

When I first got my Duster going, I had 15x6 on front with 205/70 and 15x8 on back with 275/60. Rear BS was 4.5. I can't remember what the front was. I had a 8.25 rear from a 75 Dart in it. I spaced the spring hangars back with shims to gain some clearance at the leading edge of the Quarters. Tires were very close to the springs and would occasionally rub the springs and inner wheelhouse. Here's an old pic:

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