This CX will give you an idea of how a spoke wheel and USD fork mod is done.
Personally, I'd put new spokes and alloy rims on your bike and a set of Hagon shocks set from the company to suit your bike, and just ride the thing.
Forget wide tires, they ride like crap on an old bike. If you want wide modern tires, go get a modern bike with wide modern tires.
Old bikes are not Lamborghinis or Hot Rods with fat tires, never have been, never will be.
Personally, I'd put new spokes and alloy rims on your bike and a set of Hagon shocks set from the company to suit your bike, and just ride the thing.
Forget wide tires, they ride like crap on an old bike. If you want wide modern tires, go get a modern bike with wide modern tires.
Old bikes are not Lamborghinis or Hot Rods with fat tires, never have been, never will be.