A little PB Blast will work wonders on those Flywheel bolts, Then put a wrench on one of the bolts and hit/tap the end of the wrench with a hammer......Same basic idea if you don't have a Compressor w/ An Air Gun.

Break them all loose but don't remove any bolts until every one is able to come off by hand, This will keep pressure off of just one or two bolts that are still stock tight.

G/L with the change out