Waiting on my carb rebuild kit I’ve been taking a closer look under the hood.
I noticed for the first time that the vacuum advance tube is disconnected. It looks like it should run to the (ported?) vacuum nipple on the carb that is currently capped? I remember reading here that it should be manifold vacuum (otherwise there is no vacuum at idle)? Is this the correct port? Maybe it is manifold vacuum? It’s a Holley 4 barrel. FYI, the advance does move when I suck on the tube.
I believe I set initial timing with the vacuum advance disconnected, right?
There is another vacuum tree with dodgy plugs at the back of the intake. That’s probably a question for another thread…, but I’m guessing PCV system isn’t hooked up?
Back to the distributor…. I believe I have a duraspark II ignition? It’s a 1974. The rotor looks a bit worn. I’m definitely doing plugs and wires, thinking I should at least do a new cap and rotor, but want to make sure I get the right parts. What should I look for? I remember reading that 75-76 had a different cap and rotor? Want to make sure I don’t get the wrong one.
Is there anything else I should proactively replace? Any reason I should replace the whole distributor while I’m at it? They don’t seem crazy expensive, but newer parts sometimes aren’t as good as original.
Thanks!
I noticed for the first time that the vacuum advance tube is disconnected. It looks like it should run to the (ported?) vacuum nipple on the carb that is currently capped? I remember reading here that it should be manifold vacuum (otherwise there is no vacuum at idle)? Is this the correct port? Maybe it is manifold vacuum? It’s a Holley 4 barrel. FYI, the advance does move when I suck on the tube.
![IMG_8757.jpeg IMG_8757.jpeg](https://classicbroncos.com/forums/data/attachments/901/901007-bb62e164563e097e33adf248ae9cc4b3.jpg)
I believe I set initial timing with the vacuum advance disconnected, right?
There is another vacuum tree with dodgy plugs at the back of the intake. That’s probably a question for another thread…, but I’m guessing PCV system isn’t hooked up?
![IMG_8756.jpeg IMG_8756.jpeg](https://classicbroncos.com/forums/data/attachments/901/901008-ebf5121dd74a9a285be31c18f71c740e.jpg)
Back to the distributor…. I believe I have a duraspark II ignition? It’s a 1974. The rotor looks a bit worn. I’m definitely doing plugs and wires, thinking I should at least do a new cap and rotor, but want to make sure I get the right parts. What should I look for? I remember reading that 75-76 had a different cap and rotor? Want to make sure I don’t get the wrong one.
Is there anything else I should proactively replace? Any reason I should replace the whole distributor while I’m at it? They don’t seem crazy expensive, but newer parts sometimes aren’t as good as original.
![IMG_8761.jpeg IMG_8761.jpeg](https://classicbroncos.com/forums/data/attachments/901/901009-a80ec11c7a750ed3f7c9786612f3b119.jpg)
![IMG_8762.jpeg IMG_8762.jpeg](https://classicbroncos.com/forums/data/attachments/901/901010-87bef934a02eace87c771c7e7e945716.jpg)
![IMG_8760.jpeg IMG_8760.jpeg](https://classicbroncos.com/forums/data/attachments/901/901011-7d3db89e3eaa334c09a8a61ceadd1236.jpg)
Thanks!