Need to find larger wheels.

Yeah... the problem is, the only stock wheels ever made for this bolt pattern are 13" or 14". Very few aftermarket wheels were made for this pattern, either, and you already have the most common ones: 14" slot mags. A few wheel makers (Cragar, for one) still make wheels in this pattern (which has not been used since 1976), but they are almost all 14" (because that is what fits these cars). Stockton wheel will sell you a 15" Mopar rally wheel or a 15" plain steel wheel in various widths and offsets. But good luck finding a 16 or 17... If you are really determined, you can change all the hubs to large bolt pattern (and there may be some other benefits to this, like better brakes or a bigger rear axle) — search the forums for what to do.