Go T3 or T4, OSP3 or Odonnell 97T.

As for fuel, it's best to run something that doesnt have parafin wax as a lubricant. No fuel manufacturer will outright say it, but if you've got black deposits on your piston head and/or crank, odds are you're running really rich or your fuel has wax as a lubricant.

Fuels from the major brands will typically have the best blends, but look at signatures around here and find out what's in your local shop. If you try a fuel and have trouble tuning, switch to another.