I have a lot of respect for Bob Perkins, but in the latest MM he states that the correct reservoir for the windshield washer for 67's built after 11/66 is the plastic one. I have a Dec 20 66 vert and a Feb 9 67 coupe that have bags and are original equip. I mostly see plastic on 68's and extremely late 67's. What do you guys have? Both of my cars are Metuchens.