Ok guys. were going to get new plugs and gap at .045 and get new HEI wires cause the HEI wires we bought are for a '86 Chevy truck 350 and because they are the under manifold wire, there is 1 wire that is just too short ( there pre crimped ), we got it to kinda fit but the manifold heat shield digs into it. we just got back from a cruise in and it's obviouse the ignition still needs work, when it's hammered for passing/ whatever it backfires through the carb, it used to do this only when cold now it's most of the time. what should we do beyond new plugs/ .045 gap? Thanks

Oh, My Falcon likes to foul the #5 & #6 plugs and I have went through 2 sets of Champions and finally bought a set of Autolites and I just recently had the # 5 plug foul out on me, instead of getting another plug I cleaned it off with a rag swaped it with the #3 plug and it runs great now, just have to remember this trick when it foul's again.