WHEN YOU EMAIL US YOU WILL DEAL WITH THE OWNER DIRECT FOR THE BEST CUSTOMER SERVICE ON EBAY.           YOU ARE GETTING PERTRONIX IGNITOR PART # 1283 FOR THE 1949-53 FLATHEAD 239CID ENGINES.THIS AUCTION IS FOR THE 12 VOLT NEG GROUND BUT THIS CAN BE ORDERED IN THE 6 VOLT POS,6 VOLT NEG AND 12 VOLT POS GRD FOR 8.00 EXTRA.IF YOU NEED ANYTHING OTHER THAN AUCTION ITEM,EMAIL US FOR A FAST RESPONSE   THANKS      MATT

THIS IS ALSO AVAILABLE IN THE PERTRONIX 2 AND 3.LET US KNOW IF YOU HAVE ANY QUESTIONS ABOUT THESE UPGRADES.