Electronic ignition upgrade.
I see all these guys bragging about HEI this and HEI that.....and a lot of them I have respect for. But I've worked on the line in dealerships when all this stuff was still new. I can tell you from experience that one is not really better than the other. Ford's Duraspark for example, is every bit as good. I've seen some of all the big makes electronig ignition be it Chrysler, GM, Ford or AMC (Ford) go quicker than 10 seconds. Some cars are out there running in the 8s with the Mopar style ignition. HEI or MSD my ***.