My Demon 5.7 hemi carb swap

What size and backspacing did you get for the wheels and what size/brand of tires are you running?

My Wheel ,

Front: 18X8.0 offset 25
255/40 R18 General Tire
Challenger 1974 Front disk brake
Tubular A-arm with big ball joint
Small modification of fender

Rear: 18X9.0 offset 25
275/40 R18 General Tire
8.75 rear end from B-body 62-70(track 59.2)relocate perches to 43"
0.250" cutting lip of quarter
[ame]http://www.spyncanada.com/pdf/lensod1.pdf[/ame]