Tune up question... 2500 above to -800. DA

Guys I tried like hell to get done to go to the race in Valdosta this weekend and didnt get out, but here is a good question for the tuners.

Normally I run between 2000-5000 ft of air. If you unloaded at a track and there was a difference of -3000 ft of air, where would you start?

Keep in mind, I have to hook the tire(10.5's) with a convertor, so a huge difference in air often causes mine to go nuts. How much OD% would you drop or would you do it all in the main? The air down there today is 800 below sea level.

 

tune up

I don,t think I would sleep knowing I missed -800 ft. Don