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I bought an 81 a little while back. This winter my plan is to tear everything down, clean, replace gaskets and reassemble. I wrote down everything I could find on the carbs. They are both Holley 2 barrels. Rear carb shows 3182 on the upper flange, and B-5. On the body its has 12R 5490 B, C5, D5. Under the upper flange has 1R 1262 B, A5. The lower flange has 0874. The front carb has 1964, and a B on the upper flange. 12R 5490 B, and C on the body. 1R 1262 B under the upper flange. 2484 on the lower flange. Any help would be greatly appreciated I've been searching everywhere and can not find a match. I am hoping someone here is possibly running the same setup.