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3 This is the Autolite 1100 series carburetor used on the 170 and 200ci sixes from '63-'69. Shown is a '65 version with spark control valve for use with the Autolite Load-O-Matic distributor, which doesn't have mechanical advance. The spark control valve meters vacuum to the distributor's vacuum advance as rpm increases. Spark control does not exist on '66-'67 California emissions or '68-'69 49-state.