351m identification help

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Dec 29, 2004 | 01:42 PM

76hi-boy

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351m identification help

hi i was wondering if it is possible to determine whether a 351 motor is a windsor or a modified?

Dec 29, 2004 | 02:05 PM

73Custom

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From: SD

Count the number of valve cover bolts and note whether the thermostat housing bolts to the intake or the block.

Marty

Dec 29, 2004 | 06:21 PM

hdgapeach

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From: Franklin, GA

Engine Identification

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

Engine Identification:
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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 10.7" 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.

Number 11 in the "Read First" thread of FAQ's in the "'73-'79 Trucks" forum