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Old 01-01-2003, 07:15 PM
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Post Ford 8" / 9" Questions

i have a ford 8" rear end that im planning on putting in my Duster. most think the rear wont be strong enough for what i want to do. theres a 65 or 66 mustang at the junkyard with just the 9" hosuing left. im sure i can get a centersection with a decent ratio from a van or truck, i saw alot there.

will the 28 spline 8" axles work in the 9" as long as i get a 28 spline centersection?

will the backing plates bolt up?

Or will a 8" with 4.10 gears hold up to a mild 360/727 and a manual valve body? i wont ever run slicks on it. what will be the first to breaks? my gess is the spider gears.

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Old 01-01-2003, 11:49 PM
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yes the same axles and backing plates will work as long as the length is the same.

Hmmm, 4.10s, no slicks, mild 360, fmvb...

Well i want to say that it'll hold up but depending on your meaning of "mild" it might not. I'd say if it has over 350ft-lbs then probably not.

Make sure that thats a 9inch in that mustang. To find a 65-66 mustang with a 9 is pretty rare. They only put them in hipo 289s and sheblbys. It its not, check out early broncos. They all came with 9 inch rears, its a bit narrower but that'll allow you to run wider tires. The closest thing to a direct fit in my book.
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