Use an inspection mirror and a bright light to inspect the lobe on the cam. DO NOT stick a finger into the hole and crank the engine! It would also be possible to rig a dial indicator to the block to measure the lobe lift, but turn the engine by hand, not with the starter, to do that test.
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!