Test fit Vision 18" wheel today

I started testing fitting the wheel I ordered from Vision Wheels.

These are the Vision Legend 5 172 Wheels which could be found here.

I only ordered one to test fit. If I like the fit, I'll keep it and order the rest. I haven't decided if I'll stick with the same size front and back, or if I'll stagger the wheels and go wider in the back.

The advantage of running the same size front and back would be the ability to rotate the tires, but staggering them would look cool! ;)

Here's the wheel specs:

Part Number: 142-8865GM32
Size: 18" x 8.5"
Bolt Pattern: 5 x 4.5"
Center Bore: 83 mm
Backspacing (Offset): 6.0" (+32 mm)

I didn't have enough daylight to test fit in the front, so for now I have only test fit on the rear axle. In the rear, I am running a '69 B-body 8 3/4 axle with the spring perch moved in to A-body width.

I have measured to have 1 1/4" of space between the wheel lip and the leaf springs. If I do stagger them, the 9.5" wide wheels will have 3/4" more backspacing. That would leave me with about 1/2" of space between the wheel lip and leaf springs. I'm not sure if that's enough space or not.

I plan on going with 255/40 all the way around on the 8.5" wide wheel or 275/40 on the 9.5" wide wheel for the back and 255/40 on the front.

So you think I can stuff the 9.5" wide wheel back there with 275's?