not much going on in the carb section of the forums...I was at pull and save yesterday and got what I think is a 4180 carb it has a list # 50174 and under that 0734 and in another place #e4te-9510-ara.It came off a 84 bronco. It was only 20.00 so I took it. I just picked up a 1974 f100 4x4 360-390 A/T No carb no steering box, Just to start it up and see how the motor ran I put one of my holley 750 double ppr on it fired right up but you could smell the fuel and I'm sure that's to big a carb. Anayways I'm wondering if I could put the 4180(if that's what it is) carb on and use it?? It has vent tubes or something on each end of the bowles?? Can I just plug these up?? Are they for vaccum? I'm sure there are alot of better carbs to put on it but this is what I have to work with for now. I also have a rebuilt quadrajet that came off a 350 gmc, I have a edlebrock performer manifold so I could bolt this on BUT the thing has vaccum ports all over the place and I don't have a clue what they go to. Can you just plug up what you don't use?? Also I think I read that on the rochester there is no way to hook up you'r tranny downshift linkage???

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another topic that has really nothing to do with 73-79 trucks


Holley has their own web page for Holley Carbs and that is the best place for holley carb Tech.

http://www.holley.com/


Topic: Yes you can plug the unrelated ports.

 

9d4:
Pretty common, and pretty good find for twenty bucks, if it is complete.
i would first like reply to your statement regarding the 750 DP being too large.
There is no such thing as a carb that is too large. Many times folks misunderstand, and believe poor performance is a result of a carb being too big. Poor metering, or slow air speeds improper tuning can all result in a very rich mixture. Low vacuum and transfer ports will all lead to the smell of gas resulting in the smell of unburned fuel.
Without getting too crazy about this, you can run the larger carb on your small block, and it can be tuned to work well.
On the other hand, you have this nice little 4180 just waiting to be installed on your new ride. You also have a Q-jet that is also a candidate. Your dilema is the kickdown linkage, and the vacuum ports. You may cover up all of the un-used vacuum ports, just do not connect any of them together. Too easy to mix up manifold vacuum and port vacuum.
The same is true for use of the vacuum ports. Makes certain you use the proper ports for your vacuum needs.
Best bet, would be to re-build the 4180, and go with it. Should work just fine, and with the new revised choke system, should prove to be a worthy and reliable carb.

 

The giant pipes at the end of the fuel bowls are the vents for gas vapors. You don't need them, (tho the greenies would like it if you still had that hooked up) and they can be plugged either with a freeze plug, or a rubber cap. The vacuum lines are easy, plug em, get everything installed, find the port that has ported vacuum (it give off vaccum as the RPM increases) Hook one of them ports up to your distributor, you should be good.

 

Check out this link not for trucks but good over view of carb.
How To Understand The Holley 4180 - Mustang Monthly