Upgrading Rims and Wheels for a 1968 Dart GTS

I'll upgrade my 7/16 studs to better 7/16. Chevy uses them even on trucks. I'll stick to my 275/60R15's cause I got em. Nice to know 295's fit though since I have a 67 cuda notch. Thanks! Btw, like the car. I'd like to build a 383s clone using a 400/451.