Slicks with stock spring location? (I know I'm crazy)

The biggest I could get under my 1969 Dart was a 15X7 police wheel with a 9X28 slick on it.
Not much room there.
The Barracuda & Duster,Demon can use an 8" wheel.
I run a 15X8 wheel & a 10X28 slick on my Demon.