NO tubbing out!

hey guys, I have a 75 dart sport hang ten. Just got a 440 running in it. I got an 8 3/4 rear end for an a body that I am rebuilding. Because the car is a Hang ten i dont want to tub it out (trying to keep it in original enough condition that i can sell it with original parts if i ever want to. SOO my point is that i want to install some wide rear wheels/tires. so what can i do to fit some wider rear wheels than the originals?