holy crap did i die and go to heaven? i was searching for 73-87 chevy truck rallye rims for my pickup and i found some o.e. style 15 inch wheels that are 10 inches wide!!!! this would be absolutely perfect for putting 12 inch wide tires on them.

http://wheelvintiques.com/shopsite_sc/store/html/page38.html

does anyone here know if this would work without any modifications such as tubbing the bed and whatnot? they have backspacing options of either 4.5 inches or 5 inches

Here are some for cheaper.

http://amazon.com/s/ref=sr_pg_6/104-9007173-0251145?ie=UTF8&rh=n%3A15684181%2Cn%3A15706571%2Cp%5F4%3AWheel%20V intiques&page=6

They all should work and you have plenty of room for treads.

holy crap those are cheaper than the center caps i need to buy for them (mine are original and are all corroded and whatnot)

thanks for the clarification that they should fit good.

The 15x7 version of those wheels are what I have on my Caprice. They're not just for trucks!