If the cam is junk, like it sounds like it is, drill and tap a hole in the end of it and use a slide hammer puller to try to pull it out of the block. The simple way is to drive it out from the back, but the engine has to be removed to do that. It sounds like that engine needs to become a boat anchor and you needd to find a better-condition candidate for a rebuild.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!