So I bought an 8.75" B body housing, axles and perches for $200...

OK, new twist-
I found this rear end for a pretty good price, and was thinking about using the backing plates, drums, etc. Except these axles look different. Supposed to be a 64 B body rear. Can I use a combination of these 2 rear ends and come out with one complete to put under this Barracuda?

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I don't believe those early tapered axle drums will work on later flanged axles, although I could be wrong... wouldn't be the first time. :)