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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 01-02-2012   #1 (permalink)
franko66 is offline PONY Member


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Default correct wheel size 66 mustang 5 lug

looks like my family may be buying some new or used 5 lug wheels for my 66 Mustang for my 50th birthday, My son asked me what size is the correct match and he wanted to be sure to buy the correct ones. It looks like I have a 67 -8" inch rear end which may be a little wider than a 66 -8" inch rear end, the lug pattern measures 4.25 " inches but I have read that the correct pattern is 4.5 " inches? what is the correct pattern and backspacing for 14, 15, inch wheels? any other tips or info would also be helpful.
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1966 Coupe
289 4V 600 Holley & Performer intake
4 speed toploader
Hurst Competition Plus Shifter
620 coil springs
1" Arning UCA drop
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Unread 01-02-2012   #2 (permalink)
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4.5", u must be measuring wrong
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Unread 01-02-2012   #3 (permalink)
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what about back spacing? what are the ranges of back spacing? does it vary with different width wheels?
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1966 Coupe
289 4V 600 Holley & Performer intake
4 speed toploader
Hurst Competition Plus Shifter
620 coil springs
1" Arning UCA drop
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Unread 01-02-2012   #4 (permalink)
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Are your axle tubes straight, or necked down?
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Unread 01-02-2012   #5 (permalink)
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my axle tubes are straight.They are not tapered. I checked the casting number and it referenced a 67 Mustang rear end . Its an 8" inch
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289 4V 600 Holley & Performer intake
4 speed toploader
Hurst Competition Plus Shifter
620 coil springs
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Unread 01-02-2012   #6 (permalink)
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The 67 rear is two inches wider (1 inch each side) than the 65-66 rear, to fit anything wider than a 5 inch wheel you will need custom backspace, like a 15x7 wheel you will need 5.25" instead of 4.25".
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