ya, what taffy said.
it seems to be a 55 cam and according to yer pics, no marks on the cam gear which would align with the top of the head.
to get it close, put the piston at exactly tdc and lay the cam in the head with the cam lobes up. using a straight edge on top of the lobes front to rear, turn the cam until the straightedge is exactly parallel with the head and mark the gear where the head surface sits.
hopefully, you haven't removed the clutch hub from the balancer idler without marking it, 'cause that's a whole different thing.