I know that Police cars and Wagons typically used a larger wheel bolt pattern than the normal sedans and (if you go far enough back in the 80s) coupes. I really like these wheels and would like to get a set to put on my 1992 Wagon. I would then put my truck rally wheels back on my Suburban. I know the Roadmaster and the Roadmaster Wagon used alloys, and the Custom Cruiser did, but I have never seen (to my knowledge) a Caprice Wagon with these wheels on it, and I wonder if they are the smaller GM pattern.
I would love to, but those wheels are in Northern New Jersey and I am in Southern DE. I am scouting the local boneyards for some. Unfortunately none have turned up so far, but I am still looking. I have always liked those wheels on the round bodies.
5-on-5, both. If you have a pre-'93 Sub, the offset will be wrong. Later trucks used a different offset, and you should be OK if your Sub is '94-newer (FIVE lug, of course). BTW, the full-sized cars used 5-on-5" bolt patterns, no matter if it was a sedan,, wagon, or a cop car. Wheel WIDTH was different - the cops and wagons were wider than the normal sedan.
I always thought one of these would be nice to have laying around in your toolbox. Could prevent an expensive mistake the one time you need to use it. http://www.speedwaymotors.com/Bolt-Circle-Template,5951.html