I have a 67 Coronet with 440 and edelbrock heads. I am using Headman 78030 hedders and autolite AR3924 plugs with a .750" reach. On my #4 and #1 and I think another, the plug is so long that it is nearly impossible to put the spark plug boot on. I am using firecore 50 wires. Is there a shorter plug to give me more clearance? Is it in the .750" or is that the inside the head distance? Must be combos out there like mine. Thanks.


RS23L7 4-Speed