Cool. I assume from your Avatar that you figured that one out?
A new set, all gapped the same would be a good start considering your car is new to you.
Have a look at this table and see which one matches yours!
Usually burning means too hot. Check your timing too.....does it ping at all? Try using a higher octane fuel too.
What number is on the side of your current spark plugs?
FYI: They come in different heat ranges ie: 5, 6, 7. That is, the higher the number, the plug will maintain a cooler temp due to more ceramic insulation (or less...can't remember). Generically, standard plugs are a 5, then the more worked your engine is, especially when running high compression etc, you could run a higher number or cooler plug. Flip side is that at low engine speed/idle, cold plugs foul up with oil/fuel etc.
What are your engine specs?