How Shall I Suspend My Rearend?

Ditto.

Maybe some better rear shocks or since it's in body work make sure your wheel wells are big enough now for any tire you might plan in the future. With the Dana you'll have alot of good hard use without worry. Are your frames tied now, if not good idea too.

If you had $ burning a hole in your pocket calverts would be a good choice, but for 80% street not really needed at this point. Money likely better put elsewhere.

Have fun, good luck.