66 Dart wheel size

whats size tire and rim would fit if i wanted the rear lowered? i want a pro-touring look and found this pic of a classic 66 race car that is the ride hieght i want. i want my tires to fit under my wheelwells like the ones in these pics. any suggestions? also looking at these pics, do you think this 66 has been dropped 1" or 2"s in the rear or is it factory height? my 64 sits this low in the rear, but the springs are old, so im assuming this 66 was lowered abit. im really digging its stance.

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