I have a '66 B 8 3/4" housing/brakes/axles. And open 3:91 chunk of unknown vintage. What to look for when assembling and problems. (whole axle needs disassembled cleaned)

What will it take to put under the Duster?

Can I use my present drive shaft and universal joint?

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

You might be able to use the U joint, it will depend whether or not the 8 3/4 is a 7260 or 7290 joint. The driveshaft will have to be shortened a bit. You will need to relocate the spring perches. This is what I did when I had an early B axle in my 70.

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70 Dart, 360, 727