Well you actually shouldn't see gas ON the spark plug because it's suposed to burn off. I assume you pulled the wire as a troubleshooting measure. You're engine may be flooding if that isn't the case. If it is flooding, you may have an issue with your injectors (or carb but I don't think you have one of those antique things
)
If you feel this isn't an issue, yeah, I'd start looking into the Electronic Control Module (EMC)
Some Auto Parts stores may be willing to hook up their diagnostic equiment to the EMC to see if there is a problem.
General rule of thumb for engines is if all the usuals (ie. good spark and good fuel delivery) seem ok, Try the computer after that.
Good luck and keep us posted so others can learn too.