Engine Vacuum Diagram

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84 W40

Master Mechanic
Dec 9, 2009
381
93
These illustration came out of the 1979 NPN book. Some states do test for emissions and hope this helps for some of you.
I just stumbled on those pages, I hope there's more for the other years.
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84 W40

Master Mechanic
Thread starter
Dec 9, 2009
381
93
This may be a stupid question to ask but is this diagram work on a 305sbc? (84ss)
Its not a stupid question, if the 84 ss still running the stock engine with the CCC system and you removed all of the emissions related parts including carb and distributor and replaced it with a non CCC carb, distributor and used one of the diagrams, yes it will work as long your state doesn't test for emissions.
 
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79 USA 1

G-Body Guru
Sep 2, 2011
649
93
Cheektowaga, New York
This is from Autozone's site and is for the 305ci Chevy.
0900c1528005168c.gif
 
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Griffin84ss

Greasemonkey
Apr 14, 2017
238
43
Georgetown, ky
Its not a stupid question, if the 84 ss still running the stock engine with the CCC system and you removed all of the emissions related parts including carb and distributor and replaced it with a non CCC carb, distributor and used one of the diagrams, yes it will work as long your state doesn't test for emissions.
Thank you 84 W40 for the info on this I am running the 305 non ccc and I pretty sure Kentucky doesn't check emissions.!!
 

84 W40

Master Mechanic
Thread starter
Dec 9, 2009
381
93
Thank you 84 W40 for the info on this I am running the 305 non ccc and I pretty sure Kentucky doesn't check emissions.!!
If Kentucky doesn't check emissions then your all set.
Purpose I posted those diagrams is to help others out that have strict emissions laws in there state. I know it doesn't cover every GM engine but its a start. Just need to look at every page in the books I have, thats how I found those diagrams.
 
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79 USA 1

G-Body Guru
Sep 2, 2011
649
93
Cheektowaga, New York
79 USA 1
Is this without emission (CCC).?


That is with the CCC. This is the diagram I used for the small block (267) in my 79 Monte Carlo when I swapped a 4bbl into it. Same as the 350 the carb came from. Non Computer Control. With headers I deleted the EFE temp sensor and vacuum lines . Same can be done if you do not run a EGR valve.
Carb 4bbl.gif
 
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Griffin84ss

Greasemonkey
Apr 14, 2017
238
43
Georgetown, ky
That is with the CCC. This is the diagram I used for the small block (267) in my 79 Monte Carlo when I swapped a 4bbl into it. Same as the 350 the carb came from. Non Computer Control. With headers I deleted the EFE temp sensor and vacuum lines . Same can be done if you do not run a EGR valve.
View attachment 112566
Good info. Thank you sir I am not going to be running EGR valve.
 

Griffin84ss

Greasemonkey
Apr 14, 2017
238
43
Georgetown, ky
If Kentucky doesn't check emissions then your all set.
Purpose I posted those diagrams is to help others out that have strict emissions laws in there state. I know it doesn't cover every GM engine but its a start. Just need to look at every page in the books I have, thats how I found those diagrams.
Yes sir I understand totally really good information here about it.
 
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