Ai 21A309D Module Electronic Ignition For Allis-Chalmers Tractor Case-I

4 Cyl. Models W/ 12 Volt Positive Ground Or 6 Volt Systems Converted To 12 Volt Positive Ground Systems Only. Dim A (1): Replaces Point Condenser W/ An. Dim B (2): Electronic Module. Increases Spark Plug. Dim C (3): Life Horsepower Improves Fuel. Dim D (4): Economy. Easy Note: Replaces Points Dim E (5): Condenser W/ Electronic Module.; Allis-Chalmers Tractor Several (W/ Delco Distr. 1112486 1112460)