[Oldsguy]

I know it is a personal taste issue, but I don't think that the white '77 car given as an example looks good at all with rims that large. The car will handle like a lumber wagon too if you put rims on it that large. I visit a website for older cars and they are "nose in the air" for any tire other than bias ply wide whites (30s, 40s, and 50s cars). Don't want to be that way or discourage anyone from what they want but just be careful. The fenderwells in the 70s era cars just weren't as big as they make fenderwells now, I have seen ford fusions with 35 series tires on 18 inch wheels and they fit. Don't know if that is stock or not but...... At any rate back to your car, I would just guess, this is a guess, that you won't be able to go any larger than 18 inch wheels with 3" backspacing, and 40 series tires max, and that might be too large. With 14" or 15" original wheels on the Cutlass's in the 70s I don't think they looked good if you got any bigger than 50 series tires like Mickey Thompson Drag Radials.