Hey everybody I'm Anthony an auto tech from Tucson Arizona. I look forward to getting involved with this discussion forum.

[Tony G]

I am looking for some advice in regards to a project my big mouth got me into. I am trying to put back together a 1978 C10 2wd 4.1 inline 6. Now the issue that I'm having is that the truck has had a another engine put in by another mechanic and just left this job a mess. The original engine 4.1 inline 6 had a single barrel carb with the single barrel intake and exhaust manifold. The engine that is put in there now has the o integrated style with the two barrel carburetor intake and exhaust manifold. I'm having some issues with vacuum leaks and what goes where so I thought It would just be easier to swap the head off the engine they took out and put it back to the original single barrel carb as opposed to trying to make this two-barrel work . I'm looking at time so what do you recommend I should do switch out the head and the carburetor exhaust and intake manifold or leave the two barrel in there and facilitate what it needs in order to get running because they capped off some lines wiring looks questionable and the truck won't stay running it doesn't stay running at idle I checked timing I checked firing order now I'm pretty damn sure that there are vacuum leaks but I'm not sure what goes where and now to the point of deciding which direction to go. so with that being said any information or suggestions are welcome it does have a two barrel Rochester verajet carburetor on there right now. Thank you

 

[Turbo4whl]

Welcome to the forum. In the reference section of this forum are some vacuum diagrams:

You must be registered for see images attach

You must be registered for see images attach

I did not see a diagram for the non-integral head. The integral head could have several issues. They tend to crack, then you could have leaks. Also the carbon from the EGR valve clogs the PCV port. The carbon can block it tight.

Yes you can use the earlier non-integral head.

 

[Strick]

Welcome to the site. Look around & you'll find what you're looking.

HS

 

[Doppleganger]

Biggest vac-runability issues I always had was the carb base gasket. PO had the same issues....replaced every o-ring and gasket except that one which he obviously left just for me. What a guy.

You must be registered for see images attach

 

[animal]

 

[Shorty81]

Welcome from Ohio

 

[WFO]

Welcome from the Texas Panhandle.

 

[Travlr]

I am looking for some advice in regards to a project my big mouth got me into. I am trying to put back together a 1978 C10 2wd 4.1 inline 6. Now the issue that I'm having is that the truck has had a another engine put in by another mechanic and just left this job a mess. The original engine 4.1 inline 6 had a single barrel carb with the single barrel intake and exhaust manifold. The engine that is put in there now has the o integrated style with the two barrel carburetor intake and exhaust manifold. I'm having some issues with vacuum leaks and what goes where so I thought It would just be easier to swap the head off the engine they took out and put it back to the original single barrel carb as opposed to trying to make this two-barrel work . I'm looking at time so what do you recommend I should do switch out the head and the carburetor exhaust and intake manifold or leave the two barrel in there and facilitate what it needs in order to get running because they capped off some lines wiring looks questionable and the truck won't stay running it doesn't stay running at idle I checked timing I checked firing order now I'm pretty damn sure that there are vacuum leaks but I'm not sure what goes where and now to the point of deciding which direction to go. so with that being said any information or suggestions are welcome it does have a two barrel Rochester verajet carburetor on there right now. Thank you

Before you get started, buy a Chilton or Haynes manual for squarebody trucks.

 

[Craig Nedrow]

Welcome Tony, pics help

 

[Randy and Easton]

Welcome from DFW Texas.. sounds like a handful for sure. Get folks here to help!

 

[David King]

Welcome from NW FL Panhandle!

 

[Soundmound]

Welcome from the PNW!

 

[AZ Highlander]

welcome from Prescott, Arizona!

 

[Rusty Nail]

Huh?
No pix?

 

[Bennyt]

Welcome Tony! If you do determine that it is a carb issue r/t the quadrajet, there is a quadrajet shop in Peoria. Also, next month in mid November is Dino's Git Down in Glendale at Cardinals stadium. Its a good, free Chevy show. Supposedly last year there was 10,000 Chevy trucks with 3000 of them Squares.