351m?

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Feb 11, 2008 | 04:49 PM

FrdKng94

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351m?

Ok guys.. I'm totally in love with 78/79 Bronco's. I've been looking to buy one for quite some time now and can only find one's that have the 351M. I've been told by some friends and bronco owners that the 351M is a gas-guzzling dog with no power at all. Is this true? Is a 78/79 with the 351M even worth my time or money?

Feb 11, 2008 | 06:07 PM

dragogt

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From: conroe tx

the 351M has good potential, or you can swap 460 in it's place. https://www.ford-trucks.com/article/...erformanhttp:/

http://www.fordmuscle.com/archives/2007/02/Ford400/index.php

Feb 11, 2008 | 06:58 PM

Bimmerboy1989

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the 351M is a low compression 351C I believe. I've heard it's a dog. I know of two broncos of around that year and both of them have a 460 swapped into them. The 460 is the way to go.

Feb 11, 2008 | 07:07 PM

dragogt

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From: conroe tx

the biggest problem w/ the 351m is all the emissions crap it got stuck with. get rid of that crap, install a good timing set stright up, and they can make some decent power. http://home.earthlink.net/~bubbaf250/index.html

Feb 13, 2008 | 12:40 PM

bmc69

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Turn the 351m back in to a 400, install a decent cam, 4V intake and 600 cfm carb and you'll be amazed how it performs compared to the stock 351m. If it is due for a rebuild anyway, the 400 'conversion' costs nothing extra.

Feb 13, 2008 | 05:12 PM

MBBFord

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From: Louisiana

The 351M isn't the same as a 351C, not even close.

TO actually 'turn the 351M back into a 400' you will need to put 400 crank and rods.

While in there, it'd be worth putting some new pistons and boring out the cylinder walls. With a straight up double roller timing chain, 600ish CFM carb, intake, rv cam, headers and you will have a very powerful 400. It will put a stock 460 to shame.

The 351Ms and 400s came out right when a bunch of emission standards were put in place, and basically turned them into dogs.... Retarded timing, decreased compression, catalitic convertors, egr, ect...

Feb 14, 2008 | 12:12 PM

bmc69

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Quote:

Originally Posted by MBBFord

The 351M isn't the same as a 351C, not even close.

TO actually 'turn the 351M back into a 400' you will need to put 400 crank and rods.

...

I'm sure you meant 'crank and pistons'...rods are the same. Which is why changing a 351m back to a 400 in the course of a rebuild is practically a 'no cost' upgrade, since the pistons get replaced anyway and the cost of a 400 crank kit is little more than the cost of having the 351 crank ground.