1985 Bronco 351M or W? How can I tell?
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1985 Bronco 351M or W? How can I tell?
I bought a 1985 Bronco with a rebuilt motor.
The previous owner had it rebuilt for 3K and the receipts say it's a Cleveland but the Vin code say Windsor.
The rebuild was in 1997 and the truck has only been driven 24K miles since.
I want to put headers and a true dual exhaust but I don't know which headers to order because I can't figure out which motor I have.
There are no tags on the valve covers and the company that rebuilt the motor is gone.
It has a 4bbl Holley, 3 speed auto C-6 transmission. It's pretty quick but I'd like to get more ponies to the ground.
Can anyone tell me how I can determine what I have and what headers I should use. Also, is there an outlaw true dual exhaust I can use. My converter is hollowed out and I have a glass pack with 2 & 1/2 inch pipe but I really want it to breath. Emission pump was never reinstalled and the computer has been bypassed.
Thanks,
Joe
The previous owner had it rebuilt for 3K and the receipts say it's a Cleveland but the Vin code say Windsor.
The rebuild was in 1997 and the truck has only been driven 24K miles since.
I want to put headers and a true dual exhaust but I don't know which headers to order because I can't figure out which motor I have.
There are no tags on the valve covers and the company that rebuilt the motor is gone.
It has a 4bbl Holley, 3 speed auto C-6 transmission. It's pretty quick but I'd like to get more ponies to the ground.
Can anyone tell me how I can determine what I have and what headers I should use. Also, is there an outlaw true dual exhaust I can use. My converter is hollowed out and I have a glass pack with 2 & 1/2 inch pipe but I really want it to breath. Emission pump was never reinstalled and the computer has been bypassed.
Thanks,
Joe
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From: Roanoke
There is a quick way to tell if it is a cleveland (351 or 400) or a 302/351w. You look at the thermostat location and if it is in the intake it is a 302 or 351w. If the t'stat is in the block it is a 351 or 400 cleveland. If the intake is a factory 4 bbl. it is most likely a 351c or 351w because they didn't make a 400 with a 4bbl. Hope this helps, greg
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Windsor is smaller with square valve covers while modified has curved covers and a steel rib about 3/4 in high to the right of the dist as you look at the engine while windsor does not , also windsor has 7 bolts in valve cover while modified has 8
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I hate to disagree with you, but Windsors do not have square valve covers. They are trapezoid in shape. The 351M/400 do have square valve covers, though.
Since 1982 was the last year for the 351M, I don't think you have to worry. It's a Windsor.
There was never a Cleveland engine in any truck.
Since 1982 was the last year for the 351M, I don't think you have to worry. It's a Windsor.
There was never a Cleveland engine in any truck.
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Fantastic information and I'm very grateful.
Now I need and expert Ford man's opinion about headers and duals for my 351 Windsor.
Which headers can I use and is there a kit out there that I can install myself to get true duals?
I really don't want a single pipe and local shops won't touch true duals.
Any and all suggestions are appreciated.
Joe
Now I need and expert Ford man's opinion about headers and duals for my 351 Windsor.
Which headers can I use and is there a kit out there that I can install myself to get true duals?
I really don't want a single pipe and local shops won't touch true duals.
Any and all suggestions are appreciated.
Joe
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From: San Antonio, Texas
duels are hard too do on broncos, cause of the short wheelbase and that there is a t-case right in the way for the drivers side.
My 83 had true duels and the drivers side pipe had lots of bends in it, So both pipes had too run on the pass. side and the bend back to mate too the mufflers, then over the rearend for the tailpipes.
My 82 has the driver side pipe running under the front driveshaft, but gives enough room for it at fool stock droop. Whe I do my lift, I will have too redoo my pipes.
I'm going for the 2-1/2" to 3" y-pipe with a 40 searies flowmaster.
My 83 had true duels and the drivers side pipe had lots of bends in it, So both pipes had too run on the pass. side and the bend back to mate too the mufflers, then over the rearend for the tailpipes.
My 82 has the driver side pipe running under the front driveshaft, but gives enough room for it at fool stock droop. Whe I do my lift, I will have too redoo my pipes.
I'm going for the 2-1/2" to 3" y-pipe with a 40 searies flowmaster.
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From: Roanoke
I don't think that your truck has a 351m400 because that was a big block. The 351m400 was a bunch of left over 400 cleveland motors from the torino and LTD days that Ford modified with 351c heads for more power in the trucks. The motor you have could be 351c because it can match up to most of the 302 and 351w bell housings and motor mounts without much changing. A fairly common motor for the 85 Bronco was the 351w. If you go by the t'stat location you can tell which 1 you have.
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"The 351m400 was a bunch of left over 400 cleveland motors from the torino and LTD days that Ford modified with 351c heads for more power in the trucks."
This is completely untrue. The 400 was a distinct engine line that was developed to replace the 390 in trucks and cars. Ford did not "modify" them with 351C heads, nor were they "left over." They were produced at the same point in time, and yes, they both used the same heads.
Ford destroked the 400 to 351 when they stopped producing the 351C after 1974. They used the 400 block, which is taller than the 351C block. The reason they decided to do this was that the 400 was much easier to make comply with the smog restrictions of the day.
"The motor you have could be 351c because it can match up to most of the 302 and 351w bell housings and motor mounts without much changing."
Please read above. There was NEVER a 351C engine in a Ford truck unless somebody put it there.
This is completely untrue. The 400 was a distinct engine line that was developed to replace the 390 in trucks and cars. Ford did not "modify" them with 351C heads, nor were they "left over." They were produced at the same point in time, and yes, they both used the same heads.
Ford destroked the 400 to 351 when they stopped producing the 351C after 1974. They used the 400 block, which is taller than the 351C block. The reason they decided to do this was that the 400 was much easier to make comply with the smog restrictions of the day.
"The motor you have could be 351c because it can match up to most of the 302 and 351w bell housings and motor mounts without much changing."
Please read above. There was NEVER a 351C engine in a Ford truck unless somebody put it there.
Tuned
Joined: Mar 2004
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From: Petersburg, MI
I'd go with a high flowing single pipe (like 3") True duals always have problems on the drivers side. They always put the pipe too close to the rear brake line on that side, kinda hard not to with the amount of room to work with.
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