How wide a 17" front tire for 66 Dart?

wow, if were lucky might have enough road racing cars to make a race of it, Road Atlanta 2011, im in....mine will be slightly bigger cube, 440 to be exact with a six speed tremec, keep us abreast of the development...

with the RMS front and rear suspension kit, should be able to fit 235/45r17 front and slightly bigger rear, 245/45r17 without any issues, with some additional trimming probably slightly bigger as per Bill the man at RMS
Dodge29