18" wheels

Im resurrecting this thread for some feed back on some Y2K Cobra R 5 18x9.5's. I scored the 4 of them today for $200 on CL's. The rears have 285/35/18's. Mocked them up and looks like I'll need a 3/4 spacer. I have exactly 6" BS from mounting flange to the springs. The rims are 6" of BS as well. They hit the spring with the 285's. The fronts are 245/40/18's the tires are bald. I would like to go 255/40 or 255/35 for the front. I read through many of the different threads. An understand this may be a Huge under taking but I'm willing to give a shot. Don't mind the rust and dents that's next year's task.
20180203_155259.jpg 20180203_155408.jpg

20180203_155235.jpg