ok, sounds good. Another question. I moved from 4000' high (High Desert) to 250' high ( lowlands).. Car ran fine up high, but runs like crap now. I was told here to go to smaller jets, as it was to rich. I did this (went from 73 front to 70). I have the carb apart now, and was wondering, if i should go to a lower # on the power valve as well. the # on the front says (7 on one side and 4 on the other side. Is this a 74?.) so anyway, do I want to go with a lower # on the power valve, say 65? Thanx. scott