What size 17 in rim will work on 68 Dart Converitble?

I went and double checked my front a 17x8 rim will work just not with a tire. The wheel and tire combo I have is 15x7 with 3 3/4 backspace, with a 195 60 r15 up front I remembered I tried to put a 225 60 r15 up front it wouldn't clear with that backspace. I do think I can clear a 205 60 r15. So either I keep looking or I try to make a 17x7 rambler with 4" backspace work with a small tire up front. Or I keep looking for a rim with 5" of backspace that I like. Is there any place you can shop for wheels online by size like SummitRacing? Where you can put in what dimensions you want. It then give several options.