Daily driving an A-body

Oops I guess I missed the part about you already buying it, so in that case congrats!
I'd do some preventive maintenance on it. Change out all the fluids, replace all the hoses, check the the brakes, repack/replace wheel bearings, check out and grease the suspension, replace U joints, fuel filter, belts, new battery if it's getting old etc. Of course a tune up.
Basically if it looks old, I like to replace it even if it's still working. That way I start fresh with new parts on the typical stuff that leaves you on the side of the road at the worst time. Then I keep the used but good replaced stuff in the trunk (except for the old battery of course) along with tools to swap them incase something breaks. This way hopefully you'll be trouble free for awhile, and limit the growing pains of driving a new (old) car as a daily driver.