i have a 68 firebird i have been restoring for 4 1/2 years, i am now to the exhaust, i cant find anyone who makes exhaust for it with the stock manifolds, anyone know what kind i should get and where? thanks

did you try anything like yearone.com?
or check a Pontiac magazine I find the advertisements in High Performance Pontiac may help you find companies that make the products you look for that you might not be able to find otherwise.