10" on a stock 73 Duster?

unclepunchy said

I keep hearing folks talking about SS springs. I know they are better for traction but do they give a guy more room for larger tires as well?

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Only in height. Not width. With the fender moved up, a wider tire can be used. But it wider can be used. The tire size is only approx 26-3/4 in diameter but they’re 12 - 12-1/4 inches wide depending on who makes them. They’re all close in size but not the same.

The wheel lip is the biggest item to avoid. Not so much the springs though that can be easy to come in contact with. The SS springs move the body up a good bit in order to fit a taller tire. A Duster holds a 28 inch diameter wheel without hitting the car body up front. There’s a lot of room behind the tire. If you kept the tire narrow like a stock tire, you can really go up in diameter.

The wider tire can be a problem if the springs do not hold the car up high enough. The wheel lip can touch the top of the tire. I don’t think this is a problem with the SS springs.

I just installed a set of 275/60/15 Nitto 555 on a 8.5 wide wheel. They fit right in there with stock springs on a ‘74 Duster, 8-1/4 rear.
Their 27.99 diameter and section width of 10.98.
See below;
Nitto Tires 107830 Nitto NT 555 RII Tires | Summit Racing