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  #1  
Old 10-24-2005, 09:33 PM
farmkid farmkid is offline
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Engine Info Needed

I have a '74 F880 with a 477..I think. I have also been told it has a 475?? What are the differences and how do I tell what I have? The chassis VIN has been changed by the box manufacturer in '75 so I am not sure how to look up what the correct engine should be. Any help would be greatly appreciated.

Also, is the bolt pattern on the back common with anything else? The engine is in sad shape and needs a rebuild or a replacement.

Thanks.
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  #2  
Old 10-25-2005, 01:27 AM
85e150six4mtod 85e150six4mtod is offline
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According to other posts here, these engines had an SAE bell pattern, which allowed interchange with various truck transmissions, I'm guessing.

If you are going to use this truck commercially, I'd suggest repowering with a diesel.

Scroll down on this site for another swap idea.....

http://www.6066gmcguy.org/V6powered.htm
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  #3  
Old 10-25-2005, 06:35 AM
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Quote:
Originally Posted by farmkid
I have a '74 F880 with a 477..I think. I have also been told it has a 475?? What are the differences and how do I tell what I have? The chassis VIN has been changed by the box manufacturer in '75 so I am not sure how to look up what the correct engine should be. Any help would be greatly appreciated.

Also, is the bolt pattern on the back common with anything else? The engine is in sad shape and needs a rebuild or a replacement.

Thanks.
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Old 10-26-2005, 03:36 PM
Louisville Joe Louisville Joe is offline
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I think a '475' is a '477'. In the 70's, the Super Duty engines came in the L and C series. The F-880 was a special F series medium duty with the Super Duty engine. For some reason, a 477 in an F-truck was a 475.
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Old 10-27-2005, 08:37 AM
farmkid farmkid is offline
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Thanks. Is there any way to confirm this? Can I pull numbers from somewhere on the engine to confirm? I have a lead on a 477 and if it fits, I think it would be the way to go vs. repower with a diesel. I am not looking forward to changing mounts, tranny, etc.
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  #6  
Old 10-27-2005, 05:21 PM
HOTWRENCH HOTWRENCH is offline
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Talking Engines

Farm Kid
A "475" and a "477" are the same engine some times Ford played number games with the cubic inch designations. 534, 477 & 401 will all fit your truck.
Good luck HOTWRENCH
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Old 10-27-2005, 08:31 PM
farmkid farmkid is offline
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Thanks for the info. Do you have an suggestions for improving the engine while I have it out? Just a little more power would be great. I am not greedy, I just want to get all of the power that is reasonably available out of it without going too extreme. How is the overall realiability on these engines? I think the old one has a bad head and I know it has 2 cracked exhaust manifolds. It should have had ~20K miles on it. I thought that it would have lasted longer that that. I'll know more when I tear into it.

Thanks.
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Old 10-28-2005, 07:26 AM
HOTWRENCH HOTWRENCH is offline
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Back when there were lots of these engines around here , "coal trucks" the HOT setup was to disconect the govener, put a bigger carb on it , 780 hollys were popular set the timing up a couple of degrees, The factory exhaust was too restrictive , we used to make our own mufflers out of well casing. But whatever you do pay attention to the RPM's these old girls don't take any over revving !! 3400 to 3500 rpm's is about it.
I hope this helps HOTWRENCH
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1981 L 800 460 5 speed , 2 speed rear
1957 F 600 390 5 speed
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  #9  
Old 10-31-2005, 05:55 PM
yalincoln2 yalincoln2 is offline
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hello; in the mid 70's ford went from putting the intake runners in the head to an individual runner intake. the 475 is a 477 with the late heads. the 534 is the same engine with more cubes, if your changing engines the 534 has more power, the 477's were a little doggie in a big truck. the latter engine cools better and daul exhaust will help. if you use anything but a governed carb you should put a rev limiter on it, just my oppinion, wayne.
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  #10  
Old 11-04-2005, 01:16 PM
T850 FAN T850 FAN is offline
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I think that answers my question about the 475 SD in another thread I started last night.
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  #11  
Old 11-08-2005, 06:07 AM
Still in the 60's Still in the 60's is offline
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The 475 was essentially a lower cost 477 without the warranty of the true Super Duty.
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Old 11-08-2005, 06:07 AM
 
 
 
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