I have a 86 K10 with a 305 SBC. I have a leak around the heat riser on the pass. side exhaust manifold. I was told by the dealer that its not suppose to have a gasket and auto parts stores don't list one either. My question is what is the best way to get this thing to seal up. I was thinking about removing the manifold and wire brushing the mating services to see if that would work. Any one have any ideals.