Cool. Just because they aren't an OEM replacement, doesn't mean they can't be a direct fit!
Those of you looking for a 9" housing should definitely consider going to the aftermarket. Last I checked, they were just a tad over $300. 57-59 Ford housings are awefully weak and are prone to get bent/warped. (been there, done that) Small bearing housings (all 8" and many 28 spline 9") can't use a conventional axle seal with 31 spline axles, so they have to use a bearing with an O-ring around its outside diameter to seal the oil. (it's wise to order extra o-rings) If a conventional seal is desired, a person has to step up to housing ends made for larger bearings... but then different brake backing plates are needed, as the plates for small bearings won't work.
Good Luck!
