Help!!!!!!!!!!!!

I have a stock "tall deck" 427 motor. I am trying to R&R the intake manifold and the distributor refuses to let loose and come out!!!

bump it around with a rubber mallet. don't swing away at it like a wild man an end up breakin it. maybe up swing at it to force it upword an knock it loose. but don't know what could be holding it in other than the gasket an oil pump drive an the hold down. unless the aluminum distributor welded itself to the cast iron intake?????

Whats that motor in?