Large Bolt Pattern Swap Safety Check 69 Barracuda 383

A B body rear would be 5x4.5 stock. What do you need to check back there? Have you checked rear axle bearing adjuster clearance? Does it still have an adjuster? If not it should have green style bearings now. I know you said you have A7 tapered bearings. Is that what's on the axles now? Factory it aftermarket axles? Housing cut?