One genuine NOS Chrysler part number 3514331/3514329/3438261/3438263, all numbers the same unit. This vacuum advance unit fits all 1970-1971 383/440 distributors with single point ignition with the correct vacuum time delay electrical solenoid unit and wire jumper assembly included. 100% OEM and correct, this is the one for your car either to impress the show judges peering under the hood of your 1970 Roadrunner or to satisfy the California emissions inspectors! 

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