That's funny, I was reading this and could not figure out what Hg was. Then I realized what you were talking about, mine vacuum tester uses a different measurement.
Anyway. I just did this last nite on my 84 truck. Same thing, 5
0BTDC either way. With or without the vacuum advance, or the HVAC, lines. Or combination of the two..
And if you just bought the vehicle or are thinking about it and your unsure about the smog history check this out.. CA only.
http://www.smogcheck.ca.gov/vehtests/pubtstqry.aspx
