RWeaver, I don't know why they said 12pt is better. My dad is one of the ones that said 12pt grips better (told me that yesterday), but I know for a fact that he's the one who originally told me "12pt sockets are pieces of crap because they round the bolt too easy".
I was using a breaker bar, 1/2" drive, etc. Both the 13mm and 1/2" sockets fit like a glove on there. I was using Craftsman sockets, and like I said, they fit the bolt head perfectly, so quality/fitment wasn't an issue. It was the fact that they were put back on with a damn impact and the head of the hardened bolts were beaten up from that having been done.
I went to Sears this morning, got the bolt extractor set (not the 5pc. one on sale for $10...only had 3, 5, 7, 9, & 10) but the $30 10pc. set. that has #1-#10. A torch didn't even help loosen it up (I was only able to heat one side because of the lack of space up there), none of the sockets could grab it free, PB Blaster didn't help, vise grips couldn't grip well enough because of the lack of space, and there wasn't any room to fit a chisel/punch in there to try to turn it free.....the extractor set worked like a charm and w/ the help of 3 extensions and a breaker bar, it came off like it was a brand new bolt.

If you don't have that bolt extractor set, you should get it.
EDIT: I've got one more bolt that started to round that I'm going to get off in a few minutes, then I've got the very top two that I haven't tried yet. Hopefully I won't run into too many more problems and I can get this new flywheel in today. Thanks again for the help guys.