"oldjag" wrote in message
...
Some metal content, (barely)...This started last spring actually when
I helped a driver in an '69 olds 442 convertable that died on the
roadside.


If I had to guess, I'd start with the ignition, if you find the idle mixture
is about right - with the higher compression the ignition is more critical -
put the stock Dist back, new plugs and new wires (and dist cap, etc) and see
if it's better.