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Chevrolet, All Models (1972)

Adjustments are to be made with air conditioning "OFF", air cleaner installed, engine at normal operating temperature, choke fully open, automatic transmission in "D" position or manual transmission in Neutral. Disconnect and plug distributor vacuum advance hose. Disconnect fuel tank line from vapor canister.

NOTE: On Corvette models, do not disconnect this line, remove gas cap. Proceed as follows:
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