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Looks great. What offset / backspacing do you have on your rims?

Almost. The J measurement is on the inside of the rim. The backspacing is to the outside of the rim. So a 15x8 rim is 9" wide at the ouside. Which with 0 offset has a backspacing of 4.5". Which explains a 4.25" backspacing with a -6mm offset. I just found this handy link on the summit racing...

Thanks for the information. I think ET is also called offset? "Offset is stamped on a wheel as an ET value, which refers to the German phrase “Einpress Tiefe.” ET indicates the distance between the mounting surface and the geometric centre of the wheel (the symmetry axle), usually expressed in...

Hi all! I'm looking for new rims and tires for my '68 Newport. It currently has stock 14" rims with 205/75r14 Hankook tires which are more than 10 years old and are not round anymore. I've got my eyes on a set of 15x7 for the front and 15x8 in the rear. I want the widest tires possible...

Did anyone try to modify the b body dual diaphragm booster to fit a C body? (lengthening the rod by 0.75") And which b body booster do I need? I see a lot of variation in mounting bolt pattern, size (8"-8.75") etc. Can someone point me in the right direction? I might want to try this