They had radial tires in 78. They had black wall, white wall, and RWL, depending on the wheels and what the owner wanted. The owners manual should give you the correct size.
I searched for over a month to find new 195-70-13's with RWL, ANY BRAND, and when I did I PAID for them. I found a guy that had 8, and we wanted a set AND a spare (if they were that hard to find, and ONE gets cut we would have three to take back off the car), but he would not brake up a set.... we got 8 (sorry, none are for sale).
The shocks were easy, just got them at NAPA (a while ago) and mounting them is easy most of the time. The ONLY thing I can say is that the lower bolts on the fronts tend to rust and make it very hard to get them off. A garage can use a torch on them if you don't have one, then all you will need is new bolts.
Bill