So are the vert seat platforms a different angle or height than the coupe as we know the fastback is unique and has its unique windshield but coupe and vert share same windshield in 69 70 mustangs.
I had a coupe parts car when I did the sheet metal work on my convertible. I had a picture of the two seat risers side by side but I can't find it. I remember though that the coupe's seat riser was about 3/4 inch taller than the convertible's.