switched 12v source for my Holley Sniper

Must be a special "latching relay". If using a modern ignition like HEI, Pertronix Ignitor II/III, or MSD, you don't need the ballast resistor, so can just jumper across it to get 12 VDC all the time on the IGN wire (or IGN2 wire since both are now connected). If using the 1970's Mopar ignition or even early aftermarket like Crane Cams XR700 or original Ignitor, you must use the ballast. Later HEI has electronic "dwell control" so doesn't need (or want) a ballast.