My 68 roadrunner came in boxes. So after getting most of it together I decided to install the popout windows this week. After redoing the units they don't fit. I now see that Dodge and Plymouth are different. From the bottom end of the metal strip that the glass attaches to to the end of the glass is 22.5 inches. Is this a Dodge part? Also if it is I had the clasps rechromed. Are the plymouth clasps different than the Dodge? Will the part that looks like a large C at the end of the clasp also be different or can I use the clasp and large C on the new popout windows that I think I will have to find?