Engine Identification (HELP)...
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New User
Joined: Jul 2011
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From: Eastman, Georgia
Engine Identification (HELP)...
Look i just got an 83 ford bronco 4x4 from my grand father it came with a 6 banger in it. but he sais he had a 351M put in it with a 4 speed well he also sais its got a police interceptor in it. now he is getting old so i dont think he knows what is in there. i know its got a 4 speed i do know that but anyway my step dad has a 95 stang GT 5.0 HO. ok we know thats a 302 and we also have ownd a windsor so i know its not one of those because you could put both of those engins inside of this one. so could someone tell me how i can ID the difference from one to the other thanks 
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Joined: Apr 2004
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No 351M ever intercepted anything, so where ever that "interceptor" talk came from who knows.....
The only difference between them is crank and pistons. The stroke is 3.5" vs. 4.0" for the 400. If you can measure the stroke through a spark plug hole that would be helpful.
The only difference between them is crank and pistons. The stroke is 3.5" vs. 4.0" for the 400. If you can measure the stroke through a spark plug hole that would be helpful.
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New User
Joined: Jul 2011
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From: Eastman, Georgia
To 85e150six4mtod
Yea i here ya on the (interceptor), but dude im only 16 so you got to work with me on the mesuring the sparkplug hole thing. now way it sounds to me what you are saying do you turn the engine till the piston is all the way down as far as it will go. well pull the plug out first then do i stick a tape mesure down the hole. is that what you are talking about if not sorry man i still got a lot to learn. i mean iv'e never heard of that before i mean im not saying anythings wrong with it. i have site and helpd my step dad rebuild engines a couple of times but hes never told me anything about that. so could you please tell me so i'll know thanks. ...
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Super Moderator
Joined: Apr 2004
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Yea, down the plug hole is hard, but use a piece of wire like a number 12 house wire.
http://s7.cdn.hardwareandtools.net/is/image/HardwareandTools/032076012618?wid=200&hei=200
As found on these:
http://atlanticprimesupply.com/sitebuildercontent/sitebuilderpictures/Electrical/thhn-black.JPG
Now back to square one. You are 16, and someone gave you a Bronco with a transplanted (probably) 351m.
Does it run? Good, bad, ugly?
What's the plan?
DON'T get too wrapped up in this thing--school first, I'll spare you the rest of the lecture. If it works, polish it up, tune it up, air it up and drive it.
http://s7.cdn.hardwareandtools.net/is/image/HardwareandTools/032076012618?wid=200&hei=200
As found on these:
http://atlanticprimesupply.com/sitebuildercontent/sitebuilderpictures/Electrical/thhn-black.JPG
Now back to square one. You are 16, and someone gave you a Bronco with a transplanted (probably) 351m.
Does it run? Good, bad, ugly?
What's the plan?
DON'T get too wrapped up in this thing--school first, I'll spare you the rest of the lecture. If it works, polish it up, tune it up, air it up and drive it.
Posting Guru
Joined: Nov 2008
Posts: 1,937
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From: wyoming
interceptor 351m
throw some compression at a 351m and she will intercept a lot of stuff. longer rod and rpms and compression you have a interceptor. It has a longer rod than a cleveland and really helps on the rpms. 7000 not a problem but will need to start upgrading oil lube system. restrictors and other stuff or tim meyer newer cam bearings. adios amigos.
Super Moderator
Joined: Apr 2004
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What pistons are you using to get compression out of a 351m?
7000rpm? Not with stock heads and springs.
The usual solution is to make a 400 out of it. Covered many times here.
You can call it an "Interceptor" but it was never designated as such as OEM, unlike certain FE motors for example.
The solution to the 351m:
http://www.tmeyerinc.com/400ford.html
7000rpm? Not with stock heads and springs.
The usual solution is to make a 400 out of it. Covered many times here.
You can call it an "Interceptor" but it was never designated as such as OEM, unlike certain FE motors for example.
The solution to the 351m:
http://www.tmeyerinc.com/400ford.html
Thread Starter
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New User
Joined: Jul 2011
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From: Eastman, Georgia
To 85e150six4mtod
Yea thanks for the advice and yes i am staying in school i want to join the service. but i still have to find out what im dealing with on this engine rather its a 351M or a 400. before i try to buy any engine parts you know like from the part stores and stuff.
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Posting Guru
Joined: Nov 2008
Posts: 1,937
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From: wyoming
tricks of the trade.
351 cleveland pistons/dome. con rods need to have small end bushed down for the smaller piston pins. But for normal average guy I would go with the 400. cubic inch rules in natrually aspirated world unless you can turn rpms. Once you start turning 6000+rpms you need to start looking into lube systems upgrades. yes all valvetrain was upgraded. start with tim meyer or www.mpgheads.com these guys are ford guys and will get you squared away. I use both these guys for my ford projects and a few others. check out my 400 cj ford in my photos and will be updating pictures soon. It has a 351 cleveland intake and flat top cleveland pistons. working out of state at this time and not able to up grade my photos.