New Axle Help

Hey FABO,

Officially got the front end done on the '67 Barracuda. Here are some pictures to quench that thirst.

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We're ready to get started on the rear end.

Right now it has an 8 3/4" axle housing. The differential casing is stamped 2881489 with a large 9 and a star above it.

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It has rear drum brakes with a small bolt pattern. Once again, the plan wayyy down the road is to put a big block 440 in it. We will probably end up putting disk brakes on the rear at some point as well, but that is not a priority. Right now the goal is to get a new axle with the large bolt pattern to get the matching rear wheels.

Apparently, Doctor Diff is the place to go for the new rear axles with the large 4.5" bolt pattern. When it comes to ordering them, it asks a few questions.

1. Just confirming that the rear housing width is 52 5/8" per this thread?
An accurate 8 3/4" rear axle width list

2. How do I know if I need 30 or 35 spline axles without taking them out?

3. Opinions on the bearing options provided by Doctor Diff?

4. Will the current drum brakes work on the new axle, or will I need to modify or purchase new ones?

5. Obviously the axles are ordered with studs installed for drum or disk brakes. Will I be able to modify down the road for disk brakes, or will I need to buy new axles again?

6. Will the 8 3/4" be sufficient for the 440, or should I be looking to upgrade to the Dana 60?

Sorry for the wall of questions, thanks for all the help in advance!

-Marc