Wheel and tire question for 68 GTS

Another tire question. The Dart has no power steering. Would 215/65/15's make it a little easier by offering less resistance than 215/60/15's on the front. Or should I shut up, buy some tires and stop over thinking this?
i am in the same boat with mine, and I also am going for the white steelie look and poverty caps. Don't know what the previous owner was thinking...if you look at my set up-the front tires are taller than the rears. It has Wilwood manual discs up front I believe from a 73 (has LBP axles)
I am going with 215 65 or 215 70 fronts on a 15 x6.5 rim and 275 60 on 15x8 rear.
FullSizeRender%201_zpsravcmarg.jpg
FullSizeRender%202_zpsg2qrvz8q.jpg