351?

[87Bronco351]

I just recently purchased a 1987 Bronco. It has a 351 H.O. in it but i am not shure how to tell what type it is 351W or 351C????? :huh:

 

[davids78bronco]

It's a W

 

[Guest_87BRONCO351]

how do you know the difference?

 

[Stomper4x4]

Otherwise known as a wheezer......I think the C is a bigger block? Anyhow, anything in the 80's or later, at least in a half ton is most likely a W.......I think.........

 

[davids78bronco]

A 351C was built until '74, and a C isn't an H.O. engine anyway. While both engines have a 4.38" bore, and a 3.50" stroke, the rod lengths and deck heights are different for the two -

351C - rod length= 5.778 , deck height= 9.213

351W - rod length= 5.956 . deck height= 9.480

A C has 8 valve cover bolts with tall covers, and different angles on top, a W has 6 and is shorter and flat topped

A C has the thermostat housing on the top of the block, a W has it on the top of the intake manifold

A C has it's distributor tilted towards the passenger side, the W's is vertical

C's have head castings in the upper left corner of the head, 2, 4 and M - 2= 2bbl, 4= 4bbl, and M= 351M 385 series engine

A C uses 14mm spark plugs, a W uses 5/8" plugs

SO, unless someone swapped in an older block, it's a W

 

[87Bronco351]

thanks for clearing up that question!

 

[davids78bronco]

NP, tho I spose posting that in the first place might have avoided any aggravation in th first place /emoticons/[email protected] 2x" width="20" height="20" />