im looking at 18 by 8s with a +35mm backspaceing.i just wanted to know if thay would fit.its also a 5*120 lug

 

The 35mm offset on an 8" wide wheel will put the outside edge of the tire pretty much in the same location as the stock WS6/SS 9" wide wheels. Its going to look a bit like "outriggers", being the wheel width is on the narrow side.

Wrong bolt circle... that's for a BMW. Some people run them on F-Bodys but there is risk involved. You need 5x4.75" (120.65mm). Its an onging arguement on whether its a good idea to use the 5x120mm.