Is it a 351C?
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Freshman User
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From: Philipsburg USA
Is it a 351C?
I recently bought a 1985 F-150 4x4 that originally had a I6 but they dropped in a 351. I was told buy the second owner that it was a Cleveland. How do I go about telling if it is a Cleveland, M, or a Windsor?
Thanks for the Help.
Thanks for the Help.
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Is it a 351C?
Windsor will have the thermostat housing coming straight out of the intake manifold.
351C will have the thermostat housing coming out of the block in front of the intake, and the housing, distributor and intake will all mount on one flat surface. The fuel pump bolts will be lined up vertically, not horizontally (like a 289/302/351W).
351M/400 will look like a Cleveland, except the intake mounting surface will rise about 1" higher than the surface where the distributor mounts. There will also be a "ramped up" area where the thermostat housing bolts up to account for the 1" taller deck height. Many M-blocks will also have a flange that extends out towards the front by the distributor, but not all of them have it.
Search for Bubbas M-Block V8 workshop on a search engine. That will tell you all you need to know.
351C will have the thermostat housing coming out of the block in front of the intake, and the housing, distributor and intake will all mount on one flat surface. The fuel pump bolts will be lined up vertically, not horizontally (like a 289/302/351W).
351M/400 will look like a Cleveland, except the intake mounting surface will rise about 1" higher than the surface where the distributor mounts. There will also be a "ramped up" area where the thermostat housing bolts up to account for the 1" taller deck height. Many M-blocks will also have a flange that extends out towards the front by the distributor, but not all of them have it.
Search for Bubbas M-Block V8 workshop on a search engine. That will tell you all you need to know.
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From: Saraland AL
Is it a 351C?
Valve covers are completely different between 351C and 351W. If the heads are original, on the top corners there will be a M for the 351M and 2 for the 351C 2V and 4 for the 351C 4V. The thermostat and fuel pump descriptions are good.
The 351C,M will not have the aluminum front cover that the 351W has. 351C,M has diagonal exhaust bolts, 351W has horizontal.
The 351C,M will not have the aluminum front cover that the 351W has. 351C,M has diagonal exhaust bolts, 351W has horizontal.
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Is it a 351C?
You're right -- I was having a brain fart trying to remember how many bolts for each. Should be 8 for the 351C/351M/400, and 6 for the Windsor? Also, the early M heads on 400s had a blank space instead of the 2, 4 , or M.
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From: Philipsburg USA
Is it a 351C?
Well the deck height on the manifold isnt any higher so its not a 351M but the thermostat isnt mounted on the Intake so that means its a Cleveland correct?
As far as motors go is a Cleveland a good motor? Any idea on the HP? I believe it is completely stock w/ a 2-barrel carb.
Thanks for all the help guys.
As far as motors go is a Cleveland a good motor? Any idea on the HP? I believe it is completely stock w/ a 2-barrel carb.
Thanks for all the help guys.
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Senior User
Joined: Jan 2003
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Is it a 351C?
If the thermostat housing isn't mounted to the intake, then that rules out a Windsor. If where the intake mounts is flush with the where the distributor mounts, and doesn't have a raised mounting surface, then it's probably a Cleveland. And yes, the Cleveland was an excellent engine, a little hard on gas, but until the ressurection of the 302 in the Fox bodied Mustang was the best choice for a performance 351.
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From: Saraland AL
Is it a 351C?
The Cleveland is a great engine. I personally like it better than the Windsor.
If this helps, Ford's Australian division used the Clevelands for years even in 302 CID.
The best thing about them is they don't need a lot to get good power out of them. Also easy to work on.
A 351C intake is 11 inches wide across the top.
If this helps, Ford's Australian division used the Clevelands for years even in 302 CID.
The best thing about them is they don't need a lot to get good power out of them. Also easy to work on.
A 351C intake is 11 inches wide across the top.
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From: Philipsburg USA
Is it a 351C?
Now these were only in Mustangs and Rancheros? Its mated to a 4spd OD Manual. ANy idea what tranny this is? Is it the original I dont think an I6 trannie would bolt up with a 351C.
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From: Philipsburg USA
Is it a 351C?
Yes They Do
I didnt realize these engines would work with little modifications. Now is this trannie strong enough to handle a 351C. I know the 300 I6 have some torque but...
I didnt realize these engines would work with little modifications. Now is this trannie strong enough to handle a 351C. I know the 300 I6 have some torque but...
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From: not mass
Is it a 351C?
ah the 300 big six has a lot of touque ie more than a 302 but...
i would keep an eye out for a better tranny(couldn't tell ya the best for app)
drop the suspention
chop the top down(don't be cutting up pre 80 trucks) if you can
put a set of 4v heads and a bigger cam a little more spark
a nice set of WIDE tires(rear anyway) and some shiny rims
then you can have some fun
find the driver of the **hot ricer** and invite him for a nice lesurly ride on a closed track
oddly enough i was planning the same thing with an 83 f-150 300 big six
until i remembers **sure i can cut but i still don't like it**
too new for me
i would keep an eye out for a better tranny(couldn't tell ya the best for app)
drop the suspention
chop the top down(don't be cutting up pre 80 trucks) if you can
put a set of 4v heads and a bigger cam a little more spark
a nice set of WIDE tires(rear anyway) and some shiny rims
then you can have some fun
find the driver of the **hot ricer** and invite him for a nice lesurly ride on a closed track
oddly enough i was planning the same thing with an 83 f-150 300 big six
until i remembers **sure i can cut but i still don't like it**
too new for me
Elder User
Joined: Dec 2002
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From: not mass
Is it a 351C?
well i guess your no fun
i would say that the clevland is for running fast reads FAST
was wondering how a clevland with a deck plate and sleeve with a much longer stroke bout .060 over would do but cash is going elsewhere for a while
the 400 is a truck motor torque low rpm motor EXELENT pull
dare i say bullet proof
well 400 40 over stroked with 200 dollar KB pistons and set of 240 rods is 427 should reduce reciprocating mass(short pistons) and increase rpm band
i would say that the clevland is for running fast reads FAST
was wondering how a clevland with a deck plate and sleeve with a much longer stroke bout .060 over would do but cash is going elsewhere for a while
the 400 is a truck motor torque low rpm motor EXELENT pull
dare i say bullet proof
well 400 40 over stroked with 200 dollar KB pistons and set of 240 rods is 427 should reduce reciprocating mass(short pistons) and increase rpm band
Mountain Pass
Joined: Jun 2003
Posts: 212
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From: South Jersey
Is it a 351C?
I wouldn't go much more then .030 over on a cleveland. I don't think it's too good for the motor. I have a 70 clvd in my mustang and its .030. If your not going to rev the motor over 4000 all the time stay away from the 4V heads. They only are good above the 4000 rpm mark. If you want torque and good breathing go woth a set of ported Aussie's. They breath well up high and still have good velocity at lower rpms so you have a but load of torque down low. I'd think with offroading you won't see 4000 rpms that much!
If you don't want to touch the heads or don't have the money just get a 600-650 cfm fbbl and alum. intake. Through in a set of headers and a good exhaust. If you really want more power a cam will help ALOT!!!!
Depending on the year these motors in the 2bbl form made 190-260 hp and 290-350 lb/ft. They were a beast for there size. Unfortunatly the newer the motor the less power it had. Gas crisis and emission caused them to lower the compression to like 8:1 in the latter years of the engines run. There should be a date code on your engine to give you an idea were you are starting from. The 70-71 were the best and it tapered off untill they stopped production in 75 I think. That's when they replaced it with the 351M-400 engines.
If you don't want to touch the heads or don't have the money just get a 600-650 cfm fbbl and alum. intake. Through in a set of headers and a good exhaust. If you really want more power a cam will help ALOT!!!!
Depending on the year these motors in the 2bbl form made 190-260 hp and 290-350 lb/ft. They were a beast for there size. Unfortunatly the newer the motor the less power it had. Gas crisis and emission caused them to lower the compression to like 8:1 in the latter years of the engines run. There should be a date code on your engine to give you an idea were you are starting from. The 70-71 were the best and it tapered off untill they stopped production in 75 I think. That's when they replaced it with the 351M-400 engines.