glad to be here

We have a sweet 1974 Plymouth Scamp we are trying to get 15" wheels and tires under. After putting the tires on the car, I have about an inch of gap on the drivers side and the passenger side is touching. I tried putting some long travel air shocks under the car and cannot get the body off of the tires. I welcome any and all suggestions.
[ When I pull my head out and remember where I put the cord for my camera.