Pro-touring.com's Wheel fitment database

[68firehawk]

1968 Firebird


Rear
11”x17” rims with 6.5” offset 335 35 17 tires
notched rear sub frame, rolled fenders
3.5” of drop with leafs and roll slider shackles
custom full floating ford 9”


Front
9.5”x17” rims with 4.5” offset 285 35 17 tires
custom weld in Art Morrison C-5 front sub frame
rolled fender lips.






You might also want to add a note to the list that explains the imperfections in GM's manufacturing process. Dimensions can very more then 1/2” from one car to the next. I only assume this is also the case with other automobile manufactures of the late 60's.