Larry, is the old gasket a metallic fiber one or is it composition? In my experience, that gasket does not come with a carb rebuild kit b/c it's not part of the carb itself. I would go with a factory replacement for that fella. Also, I wonder why you found so much RTV inside of the carb. They are usually investment cast items and don't warp, but they can be distorted if assembled with excessive torque. If the RTV was between the air horn and the carb body, probably had a fuel leak, if between the carb body and throttle plate, probably a vacuum leak. If you want to avoid future problems, I'd replace the carb.
1987 BMW 325