15" tire size for 67-69 Dart with B.B.P.

on the fender side i got above measurements but i plan on at least rolling a 1/4 of the lip (3/4" wide) giving me the 1/4" clearance)

You'll be pushing it w/.250" to the wheel lip. You have to consider body roll when making turns. You'll rub the tire for sure. I have a finger width (approx. .500") to the lip and no rubbing whatsoever.