Project`67 Dart GT 340 A500

If you want it not to leak find someone who has done this professionally for a long time. Since you have to take the windshield out to take the dash out, consider what else you might want to do there while you have the old window out: wiring issues are a snap when the dash is on a bench in the shop rather than upside down on your back in the car, resealing wiper pivots that notoriously leak in A-bodies. etc.