well now 100% the engine is shot, i kept driving it with the slight knock (yeah yeah i know dumb idea) but i had to get around somehow, well today i had moved my truck so i could get the 67 out and drive around the neighborhood to get it out and running, well it wouldnt start (battery needed charge) anyway so i get back in my truck to move it back and i fire it up and no joke that mofo sounded like a woodpecker on steriods! Mofo was like CLACK CLACK CLACK CLACK CLACK loud as hell, i put it in reverse and backed up then drive and pulled forward quick and shut it off (didnt do a good parking job but who cares), now its 100% out of commission, at least i know i milked that motor for all it had!