I just changed the spark plugs on my wife's 2005 V6Toyota Camry. All was pretty simple until I encountered the 2 bolts between the the intake manifold and the firewall. I had a welder and fabricated some weird shaped wrenches that made the job possible--still was extremely difficult. Any one have any tips for more easily removing those bolts. The local Toyota shop charges 2 hours to do the complete spark plug replacement. It took me far longer than than just to remove those 2 bolts. Obviously they know something I don't.