'69 Valiant parts interchangeability

Hey, What's goin on? I have a '73 Valiant and I know alot of the glass is interchangeable. My first car was a '74 back in the late '80s and the back glass is different from the '73 as well as the back end (tail lamps, trunk lid, roof line, etc.). I know they are part of the Valiant design that includes 1969 because I also looked a '68 and a '69 before finding the '73. I really liked the body lines of the '68 and '69 so I grabbed the '73 for it's low miles, condition, and back end of a '69. I know it has the same length as the '69. In the '74 and later Valiants grew a few inches. If I'm not mistaken, I think it went from 108" to 111" in 1974. It also has the grill and dash interior of my first car and the 318 and front disc brakes. I'm not 100% sure but I think front disc brakes from a '73 could install somehow on a '69.(?) I don't know but if I had a '69, I would want to see. Enjoy your cool ride! - notorius318