'75 Cherokee Chief 401 - carburetor rebuild questions

[ainokea]

Looking at the carburetor and wondering first, what exactly do I have, and second is this the stock carb. If it is the stock carb, I'll plan on rebuilding it, otherwise will try to replace with a new four barrel.

[tgreese]

Looks like the factory Motorcraft 4350 to me. You need the factory TSM for your year - https://www.rockauto.com/en/catalog/jee ... nual,10335 - not expensive on CD-ROM.

The 4350 has a unique base pattern and other carburetors will not fit its manifold. Adapters may be available (search old posts), or replace the manifold.

Oops - 4350, not 4150. Edited to correct. Subsequent poster is right.

[Stoffregen M-sports]

I just rebuilt the Motorcraft 4350 on my 1977 Cherokee. It was in tough shape with the throttle shafts rusted to the carb baseplate, but I was still able to make it like new. I bought the rebuild kit from Rock Auto, but beware of the actual variant number which is stamped on the ID tag and screwed to the lid of the carb.

The overall rebuild process was easy enough. The 4350 is Ford's version of the Quadrajet and there aren't a lot of moving parts inside. As long as you pay attention during the disassembly process, you should be ok. There are a couple check balls in various spots you need to watch out for, and the carb rebuild kit comes with new ones to replace them if you loose them.

Rule of thumb when rebuilding carberetors - all holes lead to somewhere, so if you spray air into a hole, it needs to come out somewhere, or the carb will never function properly. I have an ultrasonic cleaner in the shop, which makes cleaning carb bodies a cynch. The ultrasonic cleaner helps ensure that all tiny orifices are clean.

I do have pics of the rebuild process. Let me know if you'd like to see them.

[tgreese]

Note that the 4350 is also covered in the '77 TSM, free to read and download here: https://oljeep.com/edge_77_tsm.html

The description and repair is mostly the same between 1975 and 1977, but I would get the proper year book to be thorough.

[Stoffregen M-sports]

Thanks. I was looking for a tsm.

[1978J10REDWHITE]

One other thing you can do is put the adapter plate from its "spread bore" pattern to conventional square shape to then get a common type 4bbl.
Likely need longer mounting bolts too.

I put the Edelbrock #1906 on my 360, it's their latest design and the "off idle to 35MPH " performance is very impressive.
The extra little 1/2" rise Adapter likely will help a little on performance, in my experiences.
All the videos and reports I read on it are favorable so that convinced me to get one.

There is an outlet n Chehalis, Washington, "Mikescarburetors", I bought a 4350 rebuilt kit from that was sufficient, He has different jet sizes for the 4350 too.

[ainokea]

Awesome and thanks! I downloaded the TSM for the '77 and purchased the '75 TSM from Rock Auto (thanks Tim!). My plan is to rebuild the Motorcraft and see how it does. I think ultimately would like to put a 4bbl. Edelbrock but would like to tinker Motorcraft first and see how it goes. Stoffregen - would love to see the photos of your rebuild, just let me know how to get 'em.

[Stoffregen M-sports]

Awesome and thanks! I downloaded the TSM for the '77 and purchased the '75 TSM from Rock Auto (thanks Tim!). My plan is to rebuild the Motorcraft and see how it does. I think ultimately would like to put a 4bbl. Edelbrock but would like to tinker Motorcraft first and see how it goes. Stoffregen - would love to see the photos of your rebuild, just let me know how to get 'em.

I'll just put them here. They are mostly of the disassembly process. The more pics of disassembly, the better. You'll notice the check balls and the retaining spring I mentioned. All other parts of the job were pretty straight forward. I'll upload them in a few minutes.

[Stoffregen M-sports]

35 pics