My "new" '74 Duster- or why I need a project like a hole in the head

72bluNblu said
18x9's with a 35mm offset and 275/35/18's would be just about perfect. The back will fit fine with no other modifications. In the front you'll need a spacer. Those are the exact same specs that I'm running in the front, but I have Dr. Diff's 13" brake kit, which adds ~5mm, and I have a 3mm spacer. Probably need a 5mm spacer instead too. So, my effective backspace on the front is currently 27mm for a 73+ disk set up, and it should probably be 25mm.

Something to consider- 275's will perform better on a 10" rim. I was initially trying to stay with stock UCA's, which is why I went 18x9's. Knowing now that the stock UCA's didn't clear the rims at full lock and full droop, I would just have gone to tubular UCA's like I have now, and a 10" rim.

Also- you'll probably need to have the centerbore of most rims opened up to fit over the stock brake hub, or even Dr. Diff's 13" kits. I had to have my Enkei's opened up. They started out at the 73.1mm they advertise, which is fine, but they taper down for a smaller wheel cap. So, I had them opened up to 73mm all the way through and made my own center cap for the front. I just cut down the end off of a generic metal pull through cap and JB welded a plastic center cap that also fit the original size centerbore onto it so it would kind of match the rears.

I was able to find the wheels again:

http://www.summitracing.com/parts/mbw-61324/overview/

I saw that someone on Moparts had basically bolted this wheel style right on to a '68 Satellite Wagon, and I've seen them on some other brand-x muscle cars so I think they may actually have a hub center that is the right size. If not, at least they have a bolt-on center cap so opening the inside may not effect anything at all. My car has the 11.75 stock rotors at this point - so based on what you said, it sounds like I may need somewhere around a 10mm spacer in the front. I have the Hotchkis UCAs on the car now.

I know it will probably perform better on a 10" wheel, but at the same time I'm not quite sure I can find wheels that look classic enough in that size and not pay a ton for them. If I actually get into doing SCCA CAM-T autocross I may get another set with some direzzas or something.