Foose 17x8 4.5 bs on 67 Dart ?
You pretty much described my car and my problems to a T. I'm not sure if you did it by memory or lucky coincidence. Lol. But yes, anything wider than a 245/45/17 or 245/40/18 will be difficult to fit under a '67 Dart's rear unless everything is perfect. I used the M/T SC-5 wheels for my car. I have Dr Diff's Stage 4 brake kit with a Hotchkis front suspension and Dr. Diff's 11.75" brake kit on an A-body 8 3/4 in the rear. I have stock perches with Hotchkis leaf springs (~1" drop). I went with an 18 x 9 all the way around. I used the +32mm offset for the front (may or may not use a 5mm spacer) and a 22mm offset for the rear (needed the 5mm spacer to set the wheels as best as I can). Both front and rear have a 255/40/18 tire on it which is about 0.4" wider and 0.3" taller than a 245/45/17 or 245/40/18. Man, do you lose a lot of real estate with that small gain. Add in factory tolerances and you've got rubbage. The fronts were perfectly fine. The rears... not so much. My biggest problem was due to the factory tolerances on the rear end. The perches were welded on in such a way that the rear end favored one side over the other by about 0.25-0.5". Without a spacer, the tire was rubbing the leaf spring on one side. With the spacer, it was barely rubbing the quarter. That was the best I could get them and I measure my car up, made cardboard templates, and used mock up wheels for about 3 months before I ordered my wheels and they barely didn't fit. That being said, we're going to trim and roll the fender lips and possibly add in a MP offset shackle kit. That way, in the future, I can install 275/35/18's all the way around.
Then you should run these. :D
https://www.summitracing.com/parts/mtt-2989422/overview/
They're 18x9's with a 6.25" backspace. You could run them with 245/40/18's. In the front you wouldn't need anything, they should be fine (I run 275's with almost exactly the same offset). In the back you'll have to run a 1" spacer/adaptor, like this- 1" 5x114.3 Hubcentric Wheel Spacers Mustang GT500 Shelby Cobra SVT GT | 1.0 inch
It will be tight in the back, most of those cars have ~11" from the springs to the quarters, and a 9" wide rim is actually 10" wide outside to outside (the 9" measurement is where the tire mounts on the inside lip). So before you did that I would measure that you actually have about 11" from the inside of the quarter lip to the springs. But with the 6.25" backspace, 1" spacer, and rear disk that should end up where in needs to be. Body tolerances on these cars vary a bit, so it pays to measure a couple times before you buy anything when you start getting down to the minimum clearances.
You pretty much described my car and my problems to a T. I'm not sure if you did it by memory or lucky coincidence. Lol. But yes, anything wider than a 245/45/17 or 245/40/18 will be difficult to fit under a '67 Dart's rear unless everything is perfect. I used the M/T SC-5 wheels for my car. I have Dr Diff's Stage 4 brake kit with a Hotchkis front suspension and Dr. Diff's 11.75" brake kit on an A-body 8 3/4 in the rear. I have stock perches with Hotchkis leaf springs (~1" drop). I went with an 18 x 9 all the way around. I used the +32mm offset for the front (may or may not use a 5mm spacer) and a 22mm offset for the rear (needed the 5mm spacer to set the wheels as best as I can). Both front and rear have a 255/40/18 tire on it which is about 0.4" wider and 0.3" taller than a 245/45/17 or 245/40/18. Man, do you lose a lot of real estate with that small gain. Add in factory tolerances and you've got rubbage. The fronts were perfectly fine. The rears... not so much. My biggest problem was due to the factory tolerances on the rear end. The perches were welded on in such a way that the rear end favored one side over the other by about 0.25-0.5". Without a spacer, the tire was rubbing the leaf spring on one side. With the spacer, it was barely rubbing the quarter. That was the best I could get them and I measure my car up, made cardboard templates, and used mock up wheels for about 3 months before I ordered my wheels and they barely didn't fit. That being said, we're going to trim and roll the fender lips and possibly add in a MP offset shackle kit. That way, in the future, I can install 275/35/18's all the way around.
