I would make sure the lines are clear of blockage like he said. Then I would make sure you are not getting fuel cut. Fuel cut will also cause it. Also make sure your not getting compresser surge. Make sure the oil your using is the right weight. Warm up your car before you go ripping around...
I think your getting way ahead of yourself. I wanted to do the same. I know someone who is running a 12.7 on 680 injecs a 16g and bc set at 19psi. BUT it is all about the tune.Your best bet is to find cheaper prices. Dejon is a good brand and what not but you can find the same performance...
Very rare car I can't believe you took the time to swap AWD... I don't have the patience for that . That car is amazingly beautiful. Fight it and tell them you want 10k. And keep your car. :)