Test Your Engine Skils!!
Elder User
Joined: Jan 2007
Posts: 746
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From: Minnesota
the 351w is the windsor or small block, and the M stands for modified, or big block. ALso, If you had an early 80's with a v6 in it, it wasnt stock. Ford used the 300 inline all the way up thourgh the 96 model year. The fe 410 was a mercury car motor and not much differnent than a 390.
Elder User
Joined: Apr 2003
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Whats the difference between 351W and the 351M?
351w is windsor based, built in windsor ontario? but same family as 302.
351m is supposedly michigan built? but in the same series to the 400, and relatives of the 351cleveland. 351w engines are well designed, and would probably outlast a few 351m's-windsors have tons of aftermarket goodies avail. and can be built into monster strokers, up to 454ci I think, 408, and 427ci are common stroker kits for the 351w.
I have another Question?
Do 73s-79s have Posi-Traction?
351w is windsor based, built in windsor ontario? but same family as 302.
351m is supposedly michigan built? but in the same series to the 400, and relatives of the 351cleveland. 351w engines are well designed, and would probably outlast a few 351m's-windsors have tons of aftermarket goodies avail. and can be built into monster strokers, up to 454ci I think, 408, and 427ci are common stroker kits for the 351w.
I have another Question?
Do 73s-79s have Posi-Traction?
thats what I remember at least, hehe
Elder User
Joined: Jan 2007
Posts: 746
Likes: 1
From: Minnesota
the 351w is the windsor or small block, and the M stands for modified, or big block. ALso, If you had an early 80's with a v6 in it, it wasnt stock. Ford used the 300 inline all the way up thourgh the 96 model year. The fe 410 was a mercury car motor and not much differnent than a 390.
New User
Joined: Jan 2008
Posts: 0
Likes: 24
No M does not stand for Modified, Michigan, Minnie,Mickey,Marvelous,Mercury
There is no rhyme nor reason for the designation M .
It is just a letter for used.
More info can be found in the 335 engine forum
the 351C,351M,400 are all considered Small blocks but more importantly, FORD doesn't use those terms, Fords has Engine families.
There is no rhyme nor reason for the designation M .
It is just a letter for used.
More info can be found in the 335 engine forum
the 351C,351M,400 are all considered Small blocks but more importantly, FORD doesn't use those terms, Fords has Engine families.
Senior User
Joined: Jan 2005
Posts: 249
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From: Concordville PA
I believe in 1982 they had a V6 available in the F-100, probably into '83, '84...
And don't forget the 255 cid V8 in 1981.
And don't forget the 255 cid V8 in 1981.
Postmaster
Joined: Dec 2002
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From: Southern Oregon USA
Jason
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Senior User
Joined: Jan 2005
Posts: 249
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From: Concordville PA
I know I wasn't dreaming - here is a page from the 1983 Ford F-Series Pickup brochure, showing the 3.8l V-6 available in the F-100. (It's not what's circled, it's at the top of the list - see my gallery under 78 F-150.)
Yes, I know the 240/300 I-6 had a long running from the '60's up to '96.
Yes, I know the 240/300 I-6 had a long running from the '60's up to '96.
Senior User
Joined: Feb 2008
Posts: 314
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From: Van Isl, BC, Canada
Amen to that!
Moderator
Joined: Dec 2001
Posts: 22,436
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From: Louisville,Ky.
the 351w is the windsor or small block, and the M stands for modified, or big block. ALso, If you had an early 80's with a v6 in it, it wasnt stock. Ford used the 300 inline all the way up thourgh the 96 model year. The fe 410 was a mercury car motor and not much differnent than a 390.
It was original with a 2bbl carb. 2wd Shortbed.
EDIT: I missed the picture above of the brochure. I guess it was an early version of the 97-up with the 4.2L. Same basic engine. I knew I had one. It was tan/brown tu-tone with a 4-speed (Srod?)
The 351W is a Windsor built 351ci that is similar to the 221-302 V8 except that the deck height taller. 221-302 8.2" deck and 351W is 9.5". Thus the intake manifold is wider on the 351W vs 302 back. The heads will interchange, but the 302 uses 7/16" head bolts and the 351W uses 1/2" head bolts. I put a set of 5.0 heads on a 351W by drilling out the bolt holes
The 351M is a modified version of the 351C. It too has a taller deck than the 351C but the heads will interchange. The 351C uses a 221-351W belhousing bolt pattern and the 351M and 400 use the 429-460 bolt pattern. Both the 351C and 351M as well as the 400 have no coolant running thru the intake manifold, which makes them much easier to change
The 351W is part of the "so called Small block" Windsor family and the 351c,351m and 400 are part of the 335series engine family.
Confused yet?
Senior User
Joined: Dec 2007
Posts: 151
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From: Gulfport MS
From a book called " How to rebuild ford V8 engines" by Tom Monroe
The first column will explain it to you and I am sure there are more places that will explain the differences.
Senior User
Joined: Feb 2008
Posts: 314
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From: Van Isl, BC, Canada
Does seem strange to me though, they must have some reason behind using an M. Not that they marketed it with anything behind the letter M.
I've got the book "High Performance Ford Engine Parts Interchange". It says " 'M' means Modified Cleveland". Then again the book seperates a first section for Ford "small blocks" and the second part of the book is "big blocks".
