Wheel Tire Fitment for 70 Challenger... help.

[EvilTwin]

DriverzInc... I talked to my builder today and measure everything two more times. measured both sides too... I ended up coming up with the exact same thing you just stated.
I am 95% sure I will end up going with Centerline Laser wheels

Front - 18x8 - 5" BS with 245/45R18 (25.7" Tall, 3.9" Sidewall, 9.6" wide)
Rear - 20x8 - 5.5" BS with 285/35R20 (27.9" Tall, 3.9" Sidewall, 11.2" wide)

I am having trouble finding a match set of tires though... can't find a 285/35 anywhere. What brand of tire did you use? Any ideas?