so you CANT drive it? even if you keep revving it?

and you DIDNT do a compression test?

im just trying to ask this stuff to help narrow down the possibilities....

could be bad headgasket/rings.
could be poorly adjusted idle.
could be malfunctioning FITV or air bubbles in the coolant.
could be malfunctioning distributor.
could be incorrect engine timing.
could be worn spark plugs.
could be any combination of anything else....

please give us some more info and we can help from there.