Need Pictures of Forgeline ZX3R Wheels on 1st Gen Camaro

[ItDoRun]

The reason I was looking at the ZX3R's is because they were the only 17" wheel available through Forgeline. HOWEVER, after reading all the posts about 18" wheels on 1st gens, I'm slowly changing my mind on the 17's. I prefer the WC3's like Penny, but am curious if I can pull off the stance with 18's being that I'll be running the DSE 3" lowered leafs and their coilover set up on the front with their tubular CA's. What size wheels and backspacing would I need? I was going to run a 17x11 (5.5" BS) on the rear and 17x8 (4.875" BS) on the front. 315's and 245's tire sizes. What would be an equivalent size with 18's. I see most people are running 335/30/18's on the rear with mini tubs. Suggestions please.