4th Gen ('81-'88): Rims and tires
Welcome to the forum!! 
This link will give you a place to start looking.
Click==> 1983 Chevrolet Monte Carlo Rims, 1983 Chevrolet Monte Carlo Wheels at OriginalWheels.com
This link will give you a place to start looking.
Click==> 1983 Chevrolet Monte Carlo Rims, 1983 Chevrolet Monte Carlo Wheels at OriginalWheels.com
Monte Of The Month -- April 2015
Joined: May 2013
Posts: 3,052
From: Brockville Ontario
My personal choices would be
15 X 7 for the front and 15 X 10 for the back with 295/50/15's BF Goodrich white letter tires (on the rear only) you will need to raise the back end up with either spring spacers or air shocks though but they aren't really that expensive especially if you can find used rims in good condition as the savings vs new will pay for the suspension upgrade easily, and your car will launch better with a stiffer suspension
15 X 7 for the front and 15 X 10 for the back with 295/50/15's BF Goodrich white letter tires (on the rear only)
you will need to raise the back end up with either spring spacers or air shocks though but they aren't really that expensive especially if you can find used rims in good condition as the savings vs new will pay for the suspension upgrade easily, and your car will launch better with a stiffer suspension