Kudos to jeffcoslacker for a fix that worked great. Immediatly after pouring kero in the oil the clatttering stopped and what I am guessing was the problem, a collapsed lifter ( a loud click coinsiding with a pop in the exhaust) cleared up. I ran the car at about 2500 rpm for 5 min drained the oil, refilled with new oil and filter, and the car now runs great. The car originally had a small tic in it, but that too is gone. Thanks again.