Where to attach vacuum gauge?

[Redfalken]

I have a nice vintage vacuum gauge I would like to hook up and was wondering where to attach the hose. There is a line from the intake log to the transmission that I could probably find a "t" to feed both the gauge and the vacuum modulator. I could also probably figure a way to splice something into the hose to the PCV valve.

A friend suggested I use the vacuum from the carb that goes the the distributor but I have heard that it doesn't really have any vacuum at idle. I have a `68 200 with an Autolite 1100. Is there one source that is better than the other?

Thanks in advance!

 

[65coupei6]

Just tee the tranny/intake like you said.

 

[Anonymous]

had the same issue trying to check vacuum to set the engine idle air screw. On the one barrel the only [place to tie into is the pvc valve line at the carburator base. the line to the distributor is above the throttle butterfly and useless for constant vacuum.