HI, guys this is my first post. i own a 64 Chevy 2 i have rebuilt a 350/350 combo the engine is bored .06 im running vortech heads and an edelbrock performer intake with a edelbrock 650 cfm carb. I have a pretty good cam setup not the best but its good for now. My question is: i would like to swap my HEI distributor to an external coil HEI because its quite tight by my firewall. i need to know if there would be any wiring changes (other then the coil). Any help would be greatly appreciated.