I figured it probably would'nt work. I guess I'll have to stick with 17" wheels then. I definitely want the car lowered so I would rather sacrifice an inch of wheel.
Honestly, the 17" Saleen wheels look nowhere near as good as the 18's. For some reason when they down sized them, they just didn't modify them as well as say the FR500's...or for expample going from a 16" Pony wheel to a 17" Pony R wheel.
I would stick the 18's on there and find a spring package that doesn't slam the car. Or I would invest in some Maximum Motorsport Weight Jackers or the Steeda Weight Jack
control arms. You can fine tune the ride height with the turn of a 1/2" rachet or impact. With a stock spring in place you can raise it 2" or lower it 1". Put a nice spring in there the drop can be made lower since you are starting lower. These are AWESOME arms to get your tire/wheel package and car just right.
To give you an idea of where the rim/tire will be on the quarter panel. Here is a shot of my car.
HOWEVER:
This is a 99-04 axle with a 17X9" wheel and a +45mm offset, 285-40-17 tire. 275's would give you an extra 5mm of clearance on each side. 5mm at the quarter, 5mm at the inner well. Now....I did the math while building this car. When using a 94-98 axle with a 17X9 wheel and a +24mm offset (which is the same offset as the 18X9) the tire sits the same at the quarter using either combo. With as low as you want to go, get a tire no wider than a 275.
This pic is deceiving. The tire was 1-1/2" above the quarter. My friend said that while going over bumps it looked like the cars
suspension traveld up and down about 1". I just welded some bump stops on the frame rail so those would hit the axle 1/2" before the tire.
I went cheap to not make the car not bottom out. I did not spend the 400+ on the weight jackers, I just welded some bump stops on the frame rail so those would hit the axle 1/2" before the tire. Free, and easy. BTW....those are Steeda Sport Springs model # 8200, and HPM Mega Bite Jr's mounted on the bottom hole and using their provide two 1/4" spring spacers on each side. These springs made my car very low, too low...so I needed that extra 1/2" on each side.