Wheel to spring clearance

Garys72Duster said
Working on a 70 Dart 2 door with an A Body 8 3/4 rearend. Just wondering what is the maximum back space wheel a guy could use on this? I want to buy some 15" wheels when I get the axles re drilled to 5 on 4.5 pattern. Can I use an 8" wide rim on this ? Thinking about using Centerline wheels. Do these come with a 4" backspace? Thanks

Remember as you read through these replies that you’re technically keeping a small bolt pattern offset by redrilling your axles. So, if you listen to someone that has BBP axles about backspace you’ll probably end up with too much backspace.

4” on a 15x8, even on a SBP axle, isn’t enough though. 4.5” is what you’ll probably need, although on some cars you may need to adjust that with a small spacer. Especially for a 245. Everything has to be pretty much perfect to fit a 245 on a lot of the Dart body cars. Some can get away with 255’s, a few have had trouble fitting 235’s.

roccodart440 said
Really it is worth it on any abody to install offset shackles. It's easy and gives you an additional 3/4 of an inch.

No it doesn’t. It gives you an extra 1/2”. The front spring hanger only has a 1/2” to the frame, so good luck moving it 3/4” inboard. The MP “3/4” offset kit has a 1/2” offset hanger and a 3/4” offset shackle. Puts a bind on the spring and still ends up giving you less than 3/4” additional clearance on the front half of the spring. That’s why drdiff calls his offset kit a 1/2” offset kit.