There were a few things different with the 82-84 cars, so I can't guarantee they'd fit, but my guess is that they would. My 89 Iroc 16"x8" wheels have a "0" offset up front, and they CAN be put on the back, they just stick out a smidge. I would notice, but I doubt most people would. I think most of the affordable aftermarket sets are all "0" offset. Until you get up into the higher dollar wheels where they're made to your specs.
...as for tires, I think 245/255 width is pretty typical for a 8" wheel. Not sure about 9.5. Do a search here on TGO, and on google. You'll find all you ever need.
...and a tire size calc https://tiresize.com/calculator/