15x10 WHEELS ON A BARRACUDA
I love that after all these years you still think those tires are "under the car". Lower that car 2" and the body would be sitting on the tires. Those tires would not clear the quarters at a lower ride height.
As long as you find the tires first I see no problem with that plan. But there's only a couple of options for tires in that size, so make sure you want to run of those tires.
Actually you proved me right. You just ignored what I said about taking the measurement. The body is wider because of the flare/lip on the quarter, it's just a styling detail and has no impact at all on tire clearance, which is exactly what I said earlier. The outer wheelhouse is exactly the same part. If the outside lip on the quarter made any difference for tire clearance, you'd have a point. But what you actually need to measure for tire clearance is the distance to the outer wheelhouse, not the outside of the quarter.
Let's put it in pictures so you understand, since I also have a Duster sitting in my driveway.
The measurement to the outside of the quarter lip is 14-1/8" on my Duster. But, that's a meaningless measurement unless you remove the outer wheelhouse. The measurement that's important, the measurement to the inside of the outer wheelhouse is 13-3/8" and 13-1/4" on my car. That's after the quarter lip was cut back to match the outer wheelhouse. That's the tire clearance measurement you need. And that measurement is the same on Barracudas and Dusters. With factory body tolerances, you should expect to see that measurement to be around 13", give or take a 1/4", with a car that has stock quarter lips.
AJ/FormS's Barracuda measures 13.25" to his rolled quarter lip, my Duster is 13-1/4" on one side and 13-3/8" on the other. It's the same.
His measurements are here 275's on a dart sport
The only difference is the outside styling on the quarter, there's an extra raised lip on the Duster where the Barracuda actually has a little bit of an indent on the body detail. But neither matter, because the distance to the outer wheelhouse is what's important for tire clearance. And the outer wheelhouse is literally the same exact part on both bodystyles.
Those would be for stock locations. Actually they're probably for SBP axles too, because with BBP axles most cars have about 6" from the wheel mounting surface to the stock spring location. Subtract a 1/2" for tire clearance, another 1/2" for tire overhang/sidewall bulge and you can run about 5" of backspace on an A-body with an 8 3/4 and BBP axles. With a 15x8" and 275's a little less backspace usually works better because of the sidewall bulge, which is why 15x8's with 4.5" of backspace is usually the ticket for BBP axles. With 17x9.5's and 275/50/17's there would be almost no sidewall bulge because of the tread width matching the outer lip of the rim, so you can probably even run a little more backspace than 5".
I love that after all these years you still think those tires are "under the car". Lower that car 2" and the body would be sitting on the tires. Those tires would not clear the quarters at a lower ride height.
As long as you find the tires first I see no problem with that plan. But there's only a couple of options for tires in that size, so make sure you want to run of those tires.
Actually you proved me right. You just ignored what I said about taking the measurement. The body is wider because of the flare/lip on the quarter, it's just a styling detail and has no impact at all on tire clearance, which is exactly what I said earlier. The outer wheelhouse is exactly the same part. If the outside lip on the quarter made any difference for tire clearance, you'd have a point. But what you actually need to measure for tire clearance is the distance to the outer wheelhouse, not the outside of the quarter.
Let's put it in pictures so you understand, since I also have a Duster sitting in my driveway.
The measurement to the outside of the quarter lip is 14-1/8" on my Duster. But, that's a meaningless measurement unless you remove the outer wheelhouse. The measurement that's important, the measurement to the inside of the outer wheelhouse is 13-3/8" and 13-1/4" on my car. That's after the quarter lip was cut back to match the outer wheelhouse. That's the tire clearance measurement you need. And that measurement is the same on Barracudas and Dusters. With factory body tolerances, you should expect to see that measurement to be around 13", give or take a 1/4", with a car that has stock quarter lips.
AJ/FormS's Barracuda measures 13.25" to his rolled quarter lip, my Duster is 13-1/4" on one side and 13-3/8" on the other. It's the same.
His measurements are here 275's on a dart sport
The only difference is the outside styling on the quarter, there's an extra raised lip on the Duster where the Barracuda actually has a little bit of an indent on the body detail. But neither matter, because the distance to the outer wheelhouse is what's important for tire clearance. And the outer wheelhouse is literally the same exact part on both bodystyles.
Those would be for stock locations. Actually they're probably for SBP axles too, because with BBP axles most cars have about 6" from the wheel mounting surface to the stock spring location. Subtract a 1/2" for tire clearance, another 1/2" for tire overhang/sidewall bulge and you can run about 5" of backspace on an A-body with an 8 3/4 and BBP axles. With a 15x8" and 275's a little less backspace usually works better because of the sidewall bulge, which is why 15x8's with 4.5" of backspace is usually the ticket for BBP axles. With 17x9.5's and 275/50/17's there would be almost no sidewall bulge because of the tread width matching the outer lip of the rim, so you can probably even run a little more backspace than 5".