Removing Lower Unit - I'm stuck!

[nymack66]

Looks like the LU drive shaft is stuck to the engine, Have someone grab the flywheel and hold it, with the LU in gear forward or reverse have another person turn the prop in both directions hard whilst you apply some prying on the LU or use a 2x4 and tap it real hard. Chances are the splines are corroded or to the point of triping you will see it once its removed.
I trust you do have the bolts removed like you said.