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Carburetor Decision

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Old Jan 1, 2023 | 01:43 PM
  #16  
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The 4 bbl just bolted up to your stock 351m without any conversions?
 
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Old Jan 1, 2023 | 02:50 PM
  #17  
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Sorry! I was not clear. In my case, the truck already had an Edelbrock manifold installed so I went from a Motorcraft 4bbl to a Holley 4bbl with no additional work. I read your post and figured you had a 2bbl carb so I tried to send a link to one of the factory refurbished 2bbl that should be available from Holley. This is what I think would work in your situation but you can always call Holley and ask for their advice. They are super helpful!

https://www.holley.com/products/fuel...parts/FR-4412S

Good luck!
 
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Old Jan 1, 2023 | 06:10 PM
  #18  
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The 2150 was actually a really good carb for what it needed to do. Extremely simple and reliable, maybe not as tune-able compared to a Holley but its a 2 barrel carb so performance doesn't really enter the equation.

Get yourself a quality rebuild kit (Motorcraft if available, if not go for a higher end reman kit...) and rebuild your original carb. If you know nothing about rebuilding carbs, the 2150 is probably the best place to learn as they are simple and for the most part, idiot proof (which in my case is a good thing...)

You can rebuild it on the kitchen table in probably an hour if you really take your time to clean things up good as you go. If your wife won't allow you to use the kitchen table, I'm sure the dining room table will work equally well ; )

It's simple to rebuild and equally simple to set up when you are done. Sure you could buy a new fancy carburetor but a properly rebuilt 2150 will work just fine and save you a pile of cash in the process.
 
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Old Jan 1, 2023 | 08:10 PM
  #19  
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I've rebushed carburetor throttle shafts at home using brass bushings from Ace ... and a long bit.
 
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Old Jan 2, 2023 | 09:29 AM
  #20  
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West Coast! Thanks for the belief brother. I have already bought a rebuild kit, but I'm noticing that there are all sorts of issues. Some of the fasteners aren't original including the accelerator diaphragm pump which is fastened with four small bolts, with only two of the same size. The other two are different thread counts and wider. So three different fastener sizes. Gas was leaking from these bolts after I put in the new diaphragm, ensuring I put the fasteners back where they were when I took it apart. I think I will need to do some retapping or buy a new part. I really want to rebuild it for the experience. I just know it will take me much longer than an hour or two as the carb is majorly crusted and will take an overnight dip for sure before I scrub scrub scrub. I don't have money for a manifold at the moment, but are the conversion kits from 2bbl to 4bbl really sound? I'm talking to Holley in a bit when they open, so they can smack me in the right direction. Reading all of your comments helps alot whether I take the advice or not, because I go and research each can worms you all open.
 
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Old Jan 2, 2023 | 10:24 AM
  #21  
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On a stock low compression 351 the 4V wouldn't do you any good. you'd have a better selection of 4Vcarbs at a better price but you wouldn't save or gain anything in the end.
 
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Old Jan 2, 2023 | 11:23 AM
  #22  
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Originally Posted by 440 sixpack
On a stock low compression 351 the 4V wouldn't do you any good. you'd have a better selection of 4Vcarbs at a better price but you wouldn't save or gain anything in the end.
I'm going to disagree with you on this. A good 4V manifold and carb will help with low end and mid-range torque, even on a stock engine.
 
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Old Jan 14, 2023 | 11:13 AM
  #23  
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Gasket overhangs

I don't think I have the right base gasket for my '77 351m. The bolt holes line up, but on the cab side of the carb, it goes straight across and overhangs a bit over the indentations on the manifold and carb. This what I got at Autozone last night, because the carb did not come with a gasket as it stated it would. I was just hoping to get this on sooner rather than later. Thanks for your time again. Sorry for the simple/obvious questions. Pic on top is the gasket I have. On the bottom is what was supposed to come from Holley. e questions.


 
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Old Jan 14, 2023 | 11:27 AM
  #24  
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Gasket overhang is common. as long as it seals the entire base of the carb to the manifold go with it.
 
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Old Jan 14, 2023 | 12:30 PM
  #25  
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Originally Posted by 440 sixpack
Gasket overhang is common. as long as it seals the entire base of the carb to the manifold go with it.
Thank you.
 
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Old Jan 15, 2023 | 07:54 AM
  #26  
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Just chiming in here. If keeping stock manifold and emission setup, I believe you are limited to a MC reman (or new foreign clone). Neither Holley nor Edlebrock make a direct swap out - Venturi vac needed for EGR - and neither have it. If going 4V and new manifold, you have skads of options. If you dropped emissions setup, you also have more options. If you are keeping it OEM, you are likely stuck with an equivalent 2150 MC reman or new import. I am experimenting with both options.
 
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Old Jan 15, 2023 | 08:20 AM
  #27  
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Originally Posted by LandAndStone
Just chiming in here. If keeping stock manifold and emission setup, I believe you are limited to a MC reman (or new foreign clone). Neither Holley nor Edlebrock make a direct swap out - Venturi vac needed for EGR - and neither have it. If going 4V and new manifold, you have skads of options. If you dropped emissions setup, you also have more options. If you are keeping it OEM, you are likely stuck with an equivalent 2150 MC reman or new import. I am experimenting with both options.
A Holley 2300 v2 carb should bolt on to the Ford v2 intake manifold as it did on my AMC 302 motor that used a MC carb with the same bolt pattern as the gasket pictured above.

Also the Holley jets are not the same as the MC jets.
They may screw in as I have not tried but told the sizing is different.
I just think the Holley 2300 (half a v4 Holley carb) is a much better carb over the MC.
Dave ----

edit: only thing you would have to mess with if you want to run any carb other than the factory carb is auto kick down hook up.
 
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Old Jan 15, 2023 | 09:29 AM
  #28  
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Above is true unless you are keeping emissions. 2300 doesn’t have Venturi vac. I spoke to the guys at Holley to confirm. If you guys are running stock emission setups on a Holley 2300, let me know.
 
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Old Jan 15, 2023 | 11:25 AM
  #29  
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Originally Posted by LandAndStone
Above is true unless you are keeping emissions. 2300 doesn’t have Venturi vac. I spoke to the guys at Holley to confirm. If you guys are running stock emission setups on a Holley 2300, let me know.
That may be true for anyone needing to pass smog but we do not in NC at least not on my 81 F100.
Other than no smog pump mine looks like it would pass smog till you look a little closer were the EGR dose not have a vacuum line to it but is still in place and no cat.
Dave ----
 
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Old Jan 15, 2023 | 12:01 PM
  #30  
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I'd get another 2150, and if it needs rebuilding, get a quality kit.
 
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