Kevin proclaimed:

> Thanks for everyone's informative responses. I knew there were some
> good reasons not to go to a 160 stat, it just really bugged me that the
> smog police would care about that. The only reason I believe my timing
> is on is because every mechanic / smog tech to have ever checked it is
> getting the exact same reading as I am, but I guess I should check it
> with a gauge. I have run water slowly into the carb and am on my 2nd
> tank of Chevron 91 octane gas, both have helped but it still has a way
> to go. I think I will go ahead and remove my Air Conditioning system
> since it doesn't work anymore anyway, and the condensor is right in
> front of the radiator.
> Thanks again for everyone's help.
>

If you are using Chevron regular, I'd put money that is the problem.
Only brand/grade I regularly get ping with. Yes I know it all comes
from the same terminal in north San Jose, but the actual blend doesn't.