Thanks for the advice. Actually, the manfold on this car is split into two separate pieces one for 1-3 and the other for 4-6, so it is not necessary to pull the front one off. I don't know why the #4 gasket cracked because they are an impressive piece, but it did.
The nuts came off real easy with a little WD-40. The car is very clean having rarely been driven in the rain and never in the salt and slush, so I'm going to look into unbolting the exhaust pipe. Any other thoughts are appreciated.
FYI - The dealer wanted $250 to do this job. A little steep, huh?