I have read for hours and I’m shocked there isn’t a sticky thread on tires, wheels fitment. I own a Chevelle and the Truck is my wife’s she just got; 85 GMC C1500 long wheel base with factory 305, no rust, orig pain and 55K orig miles.
Want to lower 2.5” front, 4” rear: then new wheels & tires.
I have zero experience with this truck but my guess is 18” x 8-9” wheels with 5” backspacing should work.
I’d rather hear from others with same or greater lowering measurements as to what they are running please.
Any responses much appreciated.