Front windshield trim

OK so let try and get this straight if the trim came from a 2 door hard top I will be able to use it on my Barracuda, but if it was from a post or 4 door I iwll need to try and find the top two pieces? Do you know the lenght differance of the two / three so I can measure them to see what I have. My car is not here with me so I cannot just run out and try to fit it.
Thanks