no he doesn't. he needs to clean those plugs or get a fresh set and establish a baseline
stop touting HEI like it's some kind of magic fix for something that isn't broken.
HEI isn't gong to fix oil in the cylinder because of bad valve guides or poor compression/comustion because the rings are shot, it's not going to fix an issue where the mixture is too rich because of the wrong jets or incorrect carb settings.
a kajillion volt E coil isn't going to do a damn thing for a problem that isn't ignition related.