2 barrel preferences?
Fleet Mechanic
Joined: May 2001
Posts: 1,396
Likes: 4
From: Cupertino
My advice is to stay with what you have. You can get a rebuilt kid and a bucket of carb solvent for about $50 and you avoid potential linkage problems. The OEM carbs are simple and serve well in workhorse applications.
Senior User
Joined: Jul 2010
Posts: 239
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Personally, I prefer the Autolite 2100. I have one on a 351W in a car that I used as a daily driver for 17 years. That carb was virtually trouble free all that time. I agree it's a very nice carb to adjust. I still have the car, but I don't drive it daily anymore. It still starts and runs really nice though.
My guess is that your 351M came with an Autolite/Motorcraft 2150, unless you or someone else put a 2100 on it when you/they put it in your truck.
My guess is that your 351M came with an Autolite/Motorcraft 2150, unless you or someone else put a 2100 on it when you/they put it in your truck.
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
2X everyone above. Unless your 351M been rebuilt with better flowing heads, cam, and more compression that smogger motor can't take much more carb anyways. Because of government AVERAGE smog standards Ford had to hit the 351M/400 engines hard with smog equipment. Keep it reliable.
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Junior User
Joined: Sep 2013
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The engine was said to have maybe had a cam but nothing else to my knowledge. Thinking about trying to nip it all in the bud and buy a new holly or Edelbrock.
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Carefull there cowboy. The compression ratio was something like 8.7:1 from the factory. Heads with lousy ports. If a Holley make it a small one OR a vacuum secondary one with a quick change secondary diaphragm housing cap. You'll have to swap out for stronger springs 'till ya get rid of the pedal to the metal bog.
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Joined: Mar 2013
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From: Phoenix, Az.
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DieselDrake
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Jul 2, 2012 08:15 PM