Good afternoon guys i have looked allover and have not found anything definitive to my answer I have a 77 f350 w/460 c6 2wd I need to smog. I am need of a vacuum diagram for. Specs as follows:

1977 F350 California
460 c6 trans
non catalyst

It has a vaccum port on the front of the carb plugged.
It also has a looped vacuum line coming from the front vacuum tree going to a T not to far away down the line.
Any help would be much appreciated as any one knows if there is a line out of the place the smog **** will not smog my beast.

 

Originally the engine would have had a calibration sticker, usually on the driver side valve cover. There would be a "calibration code" on the sticker that is needed to get the correct vacuum line diagram for your rig.
If you still have that sticker / code it will help get to the correct diagram

I went through this many years back with my '78 F-250. As I remember there were several different configurations. Where the truck was sold (California or 49 state), altitude, GVW, etc. all come into play.

Good luck.

 

I wouldn't own one of these rigs unless it were smog-exempt. .. now I have three.


Screw the C.A.R.B.!

 

So the three you have are 75 and earlier?? Ibe been looking for a crewhile for a long time and this one popped up cheap. Might find a 73 with a good title and swap the door and put the 77 reg. On non op.

 

The calibration sticker is still there I'll get it tonight and post it.

 

I didnt see a calibration code. But the truck was shipped to and sold in California

 

Missing vac. lines.





Blocked off vac. Line front of carb driverside.





Looped back to itself vac. Line.

 

Is this a 4350 carb it doesn't have any tags on it but from the pictures I've seen it looks like it is.






Numbers stamped on top

 

The calibration should be 7-97J-RO


Here's a good thread with some info that may help

 

Thank you red Road for the info where did you find that sir?

 

There was a fella on this forum a few years back that had the book and diagrams that would share the info .. I copied as much as I could to my server .. I don't know where he has got off to because he was the go to guy for emissions back then .. That printed material seems so hard to locate these days and then getting someone to take a high resolution pic is the problem ..

 

any help with a vacuum diagram for a 77 f250 450 with a c6 federal emissions would be appreciated