Which bolt pattern?

There's absolutely no doubt that the newer 4.5" bolt circle gives you a better selection. This bolt pattern was and still is used on a number of cars, including the larger body Mopars, as well as 73/ later disk brake equipped A bodies, most Ford pass. cars, Dodge 2wd pickups, Studebakers, Rambler/ AMC cars, I don't know what all. LOTS of vehicles used this pattern.