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Message: <blockquote data-quote="Ford Fanatic" data-source="post: 132984" data-attributes="member: 24422">Mechanics vertigo...yep. I had a dumb moment yesterday. On my vacuum gauge, there is inches of mercury, and cm of mercury. I was reading the cm of hg, and interpteted it as inches of hg. Sorry for that bad info. According to my book ( which is different from what spitzair said - Not calling anyone out or making any accusations, I might be misunderstood. I'll try to post a picture of the timing specs for you that I tried to follow).For VACUUM advance, I should "set the test stand to 0 degrees @ 1000 rpm and 0"hg."For the centrifugal advance, I should "set test stand to 0 degrees and 250 distributor rpms (500 crankshaft rpms? right?) and 0"hg."I am assuming that this "test stand" that they speak of has a gadget on it to monitor/control the distributors vacuum.I don't know how to "set" the "hg to 0 other than disconnect/plug the hose. So thats what I did. I hooked up the vacuum gauge to the pcv valve port. I plugged the distributor vacuum hose, and fired it up. I retarded the timing to 0 degrees. It ran at 470-500 rpm, fluttering between 1-4" hg. Yes I used the right markings on the gauge this time lol I could not rev it up AT ALL without it dying and a puff out the carb. So with those instructions, I can't hit the 1000 rpm that the book is calling for. Then I looked up a chart on google, and if I did that test right, then the site with the chart is saying a burnt valve. Would you say that I am following their instructions correctly?</blockquote>

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