Does anyone know where I can get the rubber gaiter/seal that is held onto the firewall with 3 small bolts in the engine bay. it's on a 1983 Firebird t5 and the clutch rod goes through it.

 

No, sorry; I threw mine in the trash in about 1987 or so, when I got rid of that .... garbage ..... and converted it to hydraulics.

I highly recommend the conversion. AMAZING improvement over the old Stone Age linkage.

 

google 1978-1988 G-Body Clutch Firewall Rod Boot and you'll see one with 2 bolts that may be similar.

I never had that style work too well. I'd try and fine one that would better fit the inner diameter of the firewall hole instead of hoping the 3 bolts hold it for a damn.