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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Ford 9" Fitment

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Old Mar 13, 2015 | 07:51 AM
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Ford 9" Fitment

I have a Ford 9" out of a 70 Mustang. I was told by previous truck owner it was too long to put in my 52 F1 and would need cut down. Will it fit in my F1 and is it a big conversion with a bunch of fabrication? Haven't brought the rear end home yet so not sure of the exact measurements? I'm about to order Posies rear lowering kit for my truck....
 
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Old Mar 13, 2015 | 08:02 AM
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Here's a great resource for axle swaps 1948 through 1960 Ford F-1 and F-100 Rear Axle (differential) Swaps - Ford Trucks
The 1970 Mustang should be a little narrower than the F1 axle.
 
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Old Mar 13, 2015 | 08:55 AM
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Awesome. I'll check it out when I get home tonight. If it's narrower would I have to put small tubs in my bed to compensate it?
 
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Old Mar 13, 2015 | 09:00 AM
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70 mustang rears were some of the shortest of the 9" axle, 71 thru 73was a larger body car so the rears were wider.
 
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Old Mar 13, 2015 | 09:51 AM
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Other problems with using the Mustang rear is the spring pads will need to be relocated, and the axle lug pattern won't match the front, unless you have custom axle shafts made or change hubs up front, too. That's why most guys stick with the 57-72 truck 9" as it's a near bolt in and go. But it all depends on your plans for the truck.
 
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