Phil, regarding your rim situation; I was in the same boat. My first plan was to find original or original style 16" rims to replace the horrible 15x8 rims that were on the truck.
It became obvious early on that if I was able to find 4 suitable rims, they would need to be sand blasted, painted, and maybe even straightened.
I said the heck with that and bought a set of rims from Wheelsmith complete with hubcaps. Yes, they were expensive but they're perfect. I've already forgotten about the cost.
As for Coker tires; They do not have a very strong reputation in the collector car community among people who actually drive their cars anywhere except on and off a trailer.
The bias ply tires are impossible to balance because they're made from 70 year old, worn out molds. Corky Coker actually told the president of the Peach State Cadillac Club that if you plan to drive your vehicle instead of just show it, purchase Diamondback tires.
The Coker Classic radials they sell are also not very good quality. I personally had a belt separate on one in less than 10,000 miles. This is a fairly common story.
The Diamondback radials are the best tires I've ever had on my Cadillac. They balance properly and handle great while giving the appearance of a bias ply tire.
For the AD truck, I opted for blackwall tires and thus was able to find a suitable Firestone product at a reasonable cost. If I were going the wide whitewall route, I wouldn't consider any product other than Diamondback.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)