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Lnk

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Apparently come on here and b.s., see comments from 12-2 am on here when I get up at 3:10 for work all week.
I guess some are night owls, 10pm is bedtime around here, only ever stay up past that when on call, never by choice.
 

Mastermind

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I assumed that was slacking, so there is doing less than that?
Education of oneself is not slacking.

I am obsessive about certain subjects, and feel blessed to have so much information available via the internet.
 

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Loony661

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Back in 1984 I was 16 and took a summer job at a Marina wrenching on inboard and outboard motors. The boss man had a late 70's Mercury Marquis I think, it was a great big ol' sumbich of a car at any rate was powered by a 351M-400. He always said he had a "400 Michigan" in his car. Which I thought odd and never believed or heard this before or since. What I have heard on numerous occasions is the M stands for a "Modified" 351 Cleveland turned into a 400. Which if true would make Ed's theory the correct one and the 351M-400 moniker make some sense, there only was one motor, the 400.
Some things are coming back to me: The 351 Cleveland and 351 Modified are different deck heights. The 400 M debuted first, alongside the already established 351C, until the 351C was cancelled in the mid-70’s. That’s when the 351M was born. Same deck height as a 400M. Shorter stroke crank, but not the same crank as the Cleveland, because the mains are different sizes. Rods are the same between the 351M and 400M. They were a pig emissions engine in their day, but with some careful planning, can be updated and made very strong, with proper piston heights, and tighter clearances, and of course the oiling modifications.
 

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Good morning fellas. Rained all night here. Snow is gone except for the windrow from the plow along the street. It’s 37 degrees here now. In all reality, this sucks. But, I have a pile of chains to sharpen while it’s too wet to work. So I’ll take some time to catch up on things these next few days.
 

Lnk

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Some things are coming back to me: The 351 Cleveland and 351 Modified are different deck heights. The 400 M debuted first, alongside the already established 351C, until the 351C was cancelled in the mid-70’s. That’s when the 351M was born. Same deck height as a 400M. Shorter stroke crank, but not the same crank as the Cleveland, because the mains are different sizes. Rods are the same between the 351M and 400M. They were a pig emissions engine in their day, but with some careful planning, can be updated and made very strong, with proper piston heights, and tighter clearances, and of course the oiling modifications.
How does the 351m and the 400m have the same deck height, same rods, but different strokes. Are the pistons different too? I am seriously asking as it doesn't make sense in my mind. Unless the piston is taller on the 351m.
 

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How does the 351m and the 400m have the same deck height, same rods, but different strokes. Are the pistons different too? I am seriously asking as it doesn't make sense in my mind. Unless the piston is taller on the 351m.
Correct, different piston compression height (pin centerline to piston top).
 

Mastermind

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How does the 351m and the 400m have the same deck height, same rods, but different strokes. Are the pistons different too? I am seriously asking as it doesn't make sense in my mind. Unless the piston is taller on the 351m.
First off.....there is no 400M.

In 1971 Ford built the 400 as a tall block Cleveland engine. Then, they destroked it to create the 351M.

Same block, but two different displacements. Saving money was the goal here.....while also replacing the FE engine.

The 400 has the longest stroke of any Ford engine ever built, and is capable of making stupid amounts of torque at low rpm.
 

Stump Shot

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Some things are coming back to me: The 351 Cleveland and 351 Modified are different deck heights. The 400 M debuted first, alongside the already established 351C, until the 351C was cancelled in the mid-70’s. That’s when the 351M was born. Same deck height as a 400M. Shorter stroke crank, but not the same crank as the Cleveland, because the mains are different sizes. Rods are the same between the 351M and 400M. They were a pig emissions engine in their day, but with some careful planning, can be updated and made very strong, with proper piston heights, and tighter clearances, and of course the oiling modifications.
All I know is that back in the early 80's when older vehicles were ripe for the choosing for a young person with a few hundred bucks in his pocket, every last one said the same thing, 351M-400 and I never knew what the heck it was. If there was a different engine sticker, I never saw it.
What I did know for sure was they were thirsty sluggish pigs that were fixing to let their innards loose, and even if we knew of all the wonderful fixes for them back then, it would not have been financially feasible at the time, when perfectly good big block engines and transmissions were plentiful and dirt cheap to obtain and easy enough to swap out. Another thought, once converted, the now big block truck had cred where it did not before. All the splaining in the world back then wouldn't have changed a single mind about a truck with a less then desirable engine package in it. Which left all those engines waiting about for today's rodder to mess with and no one thinks any less of it either.
 
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