I pulled the carb today to give it a check out, and noticed that on the base of the carb there was substantial carbon deposits/burn marks on the bottom of it. The burn marks were primarily around the secondaries and faded out to nothing around the primaries. I was wondering if this was normal. Also there are burn marks on the sides of the intake in a kind of pattern, also more heavily burned where the secondaries are positioned. Its an edelbrock 1406 (600cfm) running on a weand 7515 single plane intake.