How to make these fit.

[Gbodyolds]

I have an 86 Monte Carlo SS I want to put the wheels pictured on it, they are available 17x9.5 56mm and 18x9.5 57mm. what will it take to make them fit ? I currently have the car lowered with eibach springs, It will also have the SCandC AFX setup on it. I'm not looking to do any modifications to the frame. whatever I do to make them fit must be safe, I drive the car on the street and when done it will probably see some time on the autocross.

https://static1.pt-content.com/images/pt/2007/09/oevettezo6hsml1x-1.jpg

https://static1.pt-content.com/images/pt/2007/09/oevettezo6hsml3x-1.jpg

[6'9"Witha69]

Spacer thickness is variable based on what backspacing would currently be used on a 9.5" wide wheel. Say for example you needed 5.5" of backspace to make a 9.5" wide wheel fit. That translates to an offset of 0.75" or 19.05mm. A wheel offset of 56mm would require a 36.95mm spacer (1.455"). At that close a 1.5" spacer would work. So just figure out what BS in inches is needed to fit 9.5" wide up front now and the rest is easy (I have a calculator built in Excel so I just plug in the numbers and voila!).

[XCESSIV]

10 wheels need 4.75 rear space will fit with g body