Rear end question

Assuming everything is tight, once a gear set starts whining on the coast side, yet is quiet on the drive side; there is almost nothing you can do about it. If you adjust the pattern to get the coast side a tiny bit quieter then the drive side will begin to sing.Without the expertise and tools to mess with it yourself, you can pay a guy to make several unsuccessful adjustments. In the end you will throw those gears away.
So now what to do.
This depends an awful lot on your future plans, and power level. If you are thinking of filling up the wheelwells, then narrowing the rear is likely on your mind too. So if you are going to spend that money, then it makes sense to spend it on something that can grow with the project.
If you're not into racing, then you dont need a Dana or even an 8.75. For a streeter, with only occasional trips to the track, and a small block(non-stroker), the smaller 8.25 will serve well. And they are cheap and readily available. You can even have two or three. They take about the same time to swap around as do the chunkers.And you can roll them in,tires and all;no heavy lifting.

You gotta love the rears that you can swap pumpkins on.