94 exhaust leak

94 xlt, 130k after replacing a broken egr pipe today, i noticed an exhaust leak coming from the connection between the exhaust manifold and the exhaust pipe. the connecting bolt for the egr pipe was *really* stuck on, and it took a day's worth of wd-40 and wrenching, but after i got it off and put the new one in, it leaks exhaust like hell where the manifold hits the exhaust pipe. haven't tried simply tightening the bolts there (it's still hot), but if that doesn't work will i have to replace the pipe from the manifold to the cat or perhaps just a gasket/seal? i don't think i need to replace the whole exh. manifold.

thanks, john