Vacuum hose help needed

[hatzie]

Originally Posted by Kaysen

Very interesting. I'm going to do this and see if it helps with the smell of gas on my non emission 350 topped with a 77 model q-jet (no 45 degree provision for vapor canister tube like the later models have) that I have in my 86.

Basic Evap or Charcoal can hookup. This is how GM did it on the cars and trucks in the 60's and early 70's.
If the carb has a bowl vent inside the air cleaner you don't need the bowl vent line. Cap off any connections on the can which had hoses that you are not using.
If you want it clean and neat run steel brake line with no threaded ferrules along the firewall and inner fender rather than draping the lines from the engine to the evap can. You can run rubber along the valve covers to the firewall and from the inner fender to the charcoal evap can.

Originally Posted by RebelSoldier

The crate motor came with a holly carb. The transmission is a th350 c. I meant the brake booster vacuum.

Your Holley will have "ported" and "manifold" vacuum taps. Usually the ported vacuum is above the throttle plates and the manifold vacuum is right at the manifold level at the bottom of the carb. If you post the model number I can probably find a diagram of which taps are what type or you can google it. Holley likely has recommendations of what taps to use for what purposes.

Following the above diagram;
Vacuum ignition advance is hooked to the same ported vacuum as the evap can purge valve vacuum.

The TH350C also has a Vacuum Modulator on the RH side of the transmission. It'll need to be hooked up to a ported vacuum tap. I usually run steel brake line down from the engine to the transmission tail and then use short sections of vacuum line at the ends.

The TH350C has a Kickdown Cable. You'll need a Holley Bracket for this cable that fits your carb and intake.

Brake booster vacuum line is direct to the rear of the manifold.
PCV and Evap can vapor purge are direct manifold vacuum on the front of the manifold or the base of the carb.