There is the numbers there that I found carb with

 

The only reason I can find to block off the primary power valve is for racing where you'll NEVER be in "cruise" - like on the highway. Of course, this is also a large truck, so I wonder if a power valve would even close.

What number is on the power valve? That'll be the vacuum setting required to get it to close.

Problem is, with a closed-off power valve, they usually put much bigger jets in it. So if you put the power valve in, the jets might be way too big. On the other hand, if you don't, at cruise, it'll run full-on rich.

 

Power valve says 6.5 and jets are 73H

 

BTW, that carb seems to be a generic 500CFM 2bbl. Not Ford at all.

 

So does that mean it won't work for my setup or jus a throw together setup ....which I dont mind as long as it works for good running engine

 

You should have the power valve in there, and you'll probably need smaller jets. But for now, try it out, and get it running first. Jets aren't that hard to change, with the carb installed. Once it's running OK - you'll have to check the plugs and see if they are sooty (running rich) or not.

 

So about that should I leave old plugs in there and check or put new ones in... was holding out til I got carb rebuilt before swapping plugs (i could jus clean up old plugs and check them after running) what u think

 

Just clean them up enough to see if they get dark again. I bet they are already black as night. It would be a good thing to know what they look like now.

 

Ok will pull those and clean after I note the scummyness cuz I'm sure they are filthy the person I bought truck from was a tad careless when it came to maintenance but I had one other ? About the two different size acc.pump diaphragm the old one is the bigger boot style but it came with a big boot and shallower boot will take pics

 

Right one is old one but big boot and left is newer shallow style i already put big one on catb but figured id adk about those

 

How deep is the pump cover? I think there's two different sizes, 30cc and 50cc? If you put the small one in a big cover, it won't engage until you're way into the go-pedal which is not what you want.

If it's a 50cc cover, use the bigger diaphragm that goes with it.

https://www.holley.com/products/fuel...ts/parts/20-11

 

Oh ok yeah the deeper one fits good so I guess 50cc it is and you said plug all vac ports on carb then check plugs clean them and see if she fires up ..... what should I do with vac ports not on carb plug then to or jus leave open?

 

You can leave the dizzy and EGR and stuff disconnected. But if there's any on the intake itself, plug those.

 

Ok So I plugged carb up and ports on intake were already plugged and egr is unhooked from w.e that exhaust valve thing is and dizzy is opened up to so should I crank it and see if she starts up