I just put some 18x10 Torq Thrust M on the rear, I would like to do 18x8 on the front. The 18x8s are only offered with 4.5 backspacing. I believe the Satellite's front backspacing is listed as 3.75, but that was for 15" rims that didn't clear some parts. Are there any Satellite owners here that can confirm 18x8 with 4.5 backspacing will fit?

Update
I can confirm that 18x8 wheels with 225/55/R18 tires fit the front of a 1973 Plymouth Satellite just fine.