I'm pretty sure there's a way to helicoil the head in-situ with a special spark plug threading tool. May be worth a look and could save you from pulling the engine!

Someone else on the CEG went through this crap before. Try searching the trouble shooting forum or look on the Snap-On webiste for info on this tool/kit.....

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!