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Old Aug 6, 2005 | 07:01 AM
  #1  
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351

I have a 1978 Ford F250 4x4 and it has a 351. I was just wondering what the easiest way to tell if it is a M,C, or W?
 
Old Aug 6, 2005 | 07:13 AM
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Old Aug 6, 2005 | 08:24 PM
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The greatest probability is that your engine is a 351M. Below you will find some identification information compiled by Torque1st:
__________________________________________________ ________

The 351W and 351C did not come stock in 73-9 trucks. Some of them have been "transplanted" tho.

Engine Identification:
=================
351C/M/400 335 series: 8 bolts in rectangular valve covers. Timing chain housing is part of block. Thermostat housing on block. Exhaust bolt holes diagonal.

351M/400 335 series: intake is 12.7" wide the 351C is narrow.

351W/302/5.0L 6 bolts on trapezoidal valve covers. Thermostat housing on intake. Exhaust bolt holes horizontal.

429/460 385 series: 7 bolts in rectangular valve cover

352/360/390/427/428 FE series: Intake goes under valve covers.

There are other indicators but these may help.
 

Last edited by firstonraceday; Aug 6, 2005 at 08:27 PM.
Old Aug 6, 2005 | 10:10 PM
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^^^ That pretty much sums it up^^^
 
Old Aug 6, 2005 | 11:03 PM
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Although the question has been answered ,FTE has an 335 engine series for these type questions.
 
Old Aug 7, 2005 | 09:02 AM
  #6  
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Thanks for the help. You were right it is a 351M.

HATCHETT
 
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