71 coupe water leaking into headliner

[bley49]

Hey all, my 71 coupe had water getting into my headliner and onto the rear speaker deck, its made my nice headliner start coming apart. The cad has been restored at one point and the windshield seals dont appear cracked, any tips on troubleshooting/fixing the leaks? Thank you in advance!

 

[Hemikiller]

If your avatar pic is your coupe, then I'd take a good look at the rear window gasket. It most likely needs to be replaced, even if it looks okay.