Bolt circle size difference between early and late models?

[thehueypilot]

I searched but found nothing that said if their is a difference. I am going to buy a 9" rear end that is built for a 93 Mustang, but I want to put the rims off my 68 Mustang onto this car. (The MT drag radials are already mounted and ready to go.) Will they fit? The 5 lug bolt circle on the 9" says it has 4.5" bolt circle. Are early model 5 lug rims 4.25 or 4.5?

 

[2nd Mustang]

Copied this off a wheel web site:

All Real Wheels and Real Nostalgia wheels are available drilled in any five-lug bolt pattern, including Ford and Mopar five on 4 1/2" and Chevy five on 4 3/4", and by special request, GM five on 5", and early Ford five on 5 1/2". They can also be supplied in the standard six-pin pattern for sprint cars and other vintage race cars.

 

[mdjay]

2nd, that was confusing

The patterns are generally the same. Ahhh..

The track width can be different and most definately there will be some welding for the spring perches.

 

[iskwezm]

late models are 5 on 4 1/2" too

 

[thehueypilot]

Thanks for the info! It seems I was measuring wrong. The bolt circle for these cars are not measured center to center (that would be normal)but from the outside of one hole straight across to the middle of another. I would of never of guessed that......Thanks again.

 

[D.Hearne]

Only 3 bolt circle sizes for 9" rears; 5 x 4.5 and 5 x 5.5 some 70's Lincolns and full size Fords had 5 x 5. All Stangs were 5 x 4.5.