351M/400M trany bolt pattern?
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Laughing Gas
Joined: Oct 2001
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From: Winchendon MA
351M/400M trany bolt pattern?
Hi gang.
I've been storing a buddy's engine for four years now he's moved three times now. Anyway it's a 351M/400M on the valve cover. Will this motor bolt up to a 302's bellhousing? Can i use the 302 flywheel? How do i tell if it's 351 or 400. All i know is its out of a bronco.
Thanks
44Dwarf
65 f100
I've been storing a buddy's engine for four years now he's moved three times now. Anyway it's a 351M/400M on the valve cover. Will this motor bolt up to a 302's bellhousing? Can i use the 302 flywheel? How do i tell if it's 351 or 400. All i know is its out of a bronco.
Thanks
44Dwarf
65 f100
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Joined: Sep 2003
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No, it will not bolt up to a 302. The only pattern that matches it is the 429/460.
The only way to tell a 351M from a 400 is to pull the head and measure the stroke, or pull the oil pan and reference the crank number. I don't have specific info on the crank number, but there are enough posts here about it to find it easily using search.
The only way to tell a 351M from a 400 is to pull the head and measure the stroke, or pull the oil pan and reference the crank number. I don't have specific info on the crank number, but there are enough posts here about it to find it easily using search.
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From: PacNW
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Posting Guru
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From: Boise, Idaho
Originally Posted by scroob
No, it will not bolt up to a 302. The only pattern that matches it is the 429/460.
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"Golly, Scroob. You don't know whether it will bolt up to a small block bellhousing or not. Your information is just plain wrong. Now the guy's gone and he's got bad information."
What in the *&^% are you talking about? I PLAINLY said that it WILL NOT bolt up to a small block.
What in the *&^% are you talking about? I PLAINLY said that it WILL NOT bolt up to a small block.
Posting Guru
Joined: Mar 2002
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From: Boise, Idaho
Guys, there was at least one year, maybe two, that the 400 was made with a small block bellhousing pattern. I thought everybody know this, but apparently not.
Edit: 1973 400 with casting number D3AE-B is the magic number. Maybe the guy who was saving the engine knew he had the oddball 400 with the small block bellhousing pattern.
Edit: 1973 400 with casting number D3AE-B is the magic number. Maybe the guy who was saving the engine knew he had the oddball 400 with the small block bellhousing pattern.
Last edited by pcmenten; Apr 10, 2004 at 03:42 PM.
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From: Sin City, USA
Originally Posted by pcmenten
Guys, there was at least one year, maybe two, that the 400 was made with a small block bellhousing pattern. I thought everybody know this, but apparently not.
Edit: 1973 400 with casting number D3AE-B is the magic number. Maybe the guy who was saving the engine knew he had the oddball 400 with the small block bellhousing pattern.
Edit: 1973 400 with casting number D3AE-B is the magic number. Maybe the guy who was saving the engine knew he had the oddball 400 with the small block bellhousing pattern.
--J
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From: PacNW
The 400 FMX was a 1 year only option, that year being 1973. The 351M didn't come out until 1975, so there never was a 351M FMX block. Since the valve covers say 351M/400 and it's highly unlikely that FoMoCo was thinking far enough ahead to label the engine with a designation prior to it's existence, I'd say the chances of it being a 400 FMX block are slim & none.
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1961 - 1966 F-100 & Larger F-Series Trucks
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Sep 10, 2002 10:27 AM