I have an idea for the wheels and tires for my 1987 GN. The w heels are made by Edelbrock. Edelbrock 409 wheels in polished aluminum in the 17x8 size with 245/45/zr17 tires. Give me some opinions if they will fit if anyone has 17" wheels please give your impression. The overall diameter of the tires are 25.7 which is exactly the same as a 245/50/16. The 215/65/15 tires are 26.0. Backspacing recommendations? Thanks in advance!