Anybody running 17" Cobra Bullit rims on a Duster

buckshotbishop said

hate to be that guy but...
im looking at the 18x9" fr500 from american muscle for my 69 valiant

im running dr diff axles in an a body housing with the mopar .75in relocation
( seems to me that it only moved in .5 per side ) and dr diff's viper caliper kit with rms uca

so the big question what do i have to do to make them work?

Click to expand...

18x9 FR500's are listed with a backspace of 6.2" at American Muscle.

That should be about perfect for the front, you may still need to either open up the center register or turn down the end of the hub on your disks. I'm not sure what the register size is on the aftermarket FR500's is, you may not have to do anything at all in front.

In the back you're going to have too much backspacing, even with the spring offset. I had 17x9's with a 275/40/17 on the back of my Duster with a stock A body rear and 4.75" of backspace, and pretty much no room to the springs. So, to run an 18x9" with 6.2" backspace even with the offset I'd say you're going to need a 1" spacer. That should be about right, figure 4.75" bs for a 9" rim on an A body rear, add .5" for the offset, so thats 5.25", you're at 6.2", so a 1" spacer should put you right there.

What size tires are you planning? I'd venture that you should be able to fit 275's all the way around, of course if you go a little smaller than that it will make fitting everything a bit easier...