[mr48chev]

I'd have to think a fair majority of the S-10 swap brigade is into the 18 inch or larger wheels and fat low profile tires and Those tend to work with the wms to wms of the S=10 where 15x7 steelies that aren't reversed look a bit odd tucked way into the fenders on them. Kind of like running the skinny spare on your wife's mini van.

I did see some misinformation in an above post that needs to be clarified.

Almost all post 1973 GM 1/2 ton GM trucks and vans run on a 5 on 5 bolt pattern.

Depending on the drive train and body style the majority of Caprices, Olds, Pontiac, buick and all Cadillac Big cars had a 5 on 5 bolt pattern.

You could find 5 on 4-3/4 on the mid size Chevelle or other GM equivalent size rigs and some full size Chevy and Olds 88 rigs. On the Chevy and Olds 88 you can't assume that it has one or the other you actually have to check. They had two brake rotor/drum sizes depending on the drive train