Not Ranked
I'm not sure, with the exception of the one on top of the radiator hose oulet that the temprature probe is in, the only other I would hazard a guess might be the blue one closest to the distributor. The 2 others are definately vacuum. BTW check the accelerator pump diaphram on your carb, it looks like it's leaking.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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