After removing the passenger side exhaust manifold for a leak I found this excess material in the #2 exhaust port of my 1967 430. Total quality control failure, not what I would expect for a Buick flagship. This is a running driving smooth idling stock never touched 61,ooo original mile engine. Has anyone else seen something like this on any other engine? I never have and I've been working on cars for over 40 years. - Bill