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Either the 7.25 was upgraded over the years or something is wierd. I have seen several LOADED 73-76 slant six 4 door Valiants and Darts with the 7.25 axle. They theoretically should have had the 8.25 if durability was a concern. I stick with the towing package theory. HD axle, Trans cooler in HD radiator and 7 blade fan with fan clutch.



Oh I agree. The later cars seem skimpy with the 8 1/4" rear. Although I do know of a 74 Dart Sport convertiple with /6 manual trans and 8 1/4". I'm thinking the manual trans did it.

But I don't think all those car we're finding the rear ends have trailer towing. MoparMarks, does the fender tag on those cars show trailer towing? Is trailer towing even on the fender tag?

Now IIRC, disk brakes automatically got you HD suspension.