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Re: Ford 9" w/ stock trailing arms ??
'66-'70 full size Fords and Mercurys, '71-'72 Lincolns and '68-'72 F100 Ford trucks have 31-spline axles, large ball-type axle bearings and a 61" overall width (measured from drum face to drum face). Some of these units also have large 3-1/4" axle tubes, rather than the standard 3." Remember though, that a traditional 9" third member must be exchanged for the unacceptable 9-3/8 ring gear found in most housings with the 3-1/4 tubes. Another favorite, especially with street rodders, is the '79-'81 Lincoln Versailles rear end. An extra thick wall housing, factory disc brakes, 28 spline axles, large ball type axle bearings, leaf spring mounting pads and a 58-1/2" overall width make it a natural swap in most cars of the thirties and early forties.
'77-'80 Lincoln Versailles (and '75-'80 Granada/Monarch) 9-inch disc brake housing tubes are 3".
'57-'59 Ford big car, Ranchero/station wagon 9-inch rear tube diameter is also 3".
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