Tire discounters can’t align my Dart.

Your best bet is to find an “old school” alignment shop. Most newer shops will only align to “book” specs. If your running bias ply tires, that’s ok, if your running radial tires, the book spec is not correct and will steer like you just found out... look up ”Skosh chart” and “alignment” here on the forum. That is the recommend specs for radial tires. My local old school shop was 125 with tax.