Holley Model 6520 2 Barrel Carburetor

Fig. 9 Concealment plug removal.:

1. Remove air cleaner cross over assembly.
2. Remove canister purge and diverter valve vacuum hose.
3. Center punch at a point 1/4 inch from end of mixture screw housing.
4. Drill through outer housing with a 3/16 inch drill bit, Fig. 9.
5. Pry out concealment plug and save for installation.