Personally, I wouldn't change it. The F-100 isn't the equal of the Mig-19 in a dogfight. Even so, I 've been able to bring down Mig-19s on regular basis in the Hun. Last night, I dropped 4xMig-17s in the F-100 (Normal enemy skill), and the '17 is an even better turn-n-burner than the Mig-19. Granted, my '17s have slightly tweeked FMs - and I seriously mean "slightly" because I fly and fight (VERY successfuly) in the same '17 too.  
  
My point being, you can successfully dogfight in the Hun the way it is. Just remember to keep your speed high and never, never forget to use your rudder in the turns. I also get a lot of kills in the F-100 by bringing the fight down close to the ground ( close enough to pick some mangos ) where the AI is unwilling to maneuver as hard as they usually do.