Thread: How do I know which 351 I've got?

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The simplest Way to tell a Cleveland or M engine from a Windsor is to count the valve cover bolts . If It has 8 bolts it is a Cleveland or M engine . A Windsor or 302 has 6 valve cover bolts . This is the easiest way and there is no way you can make a mistake . To tell a Cleveland from a M engine count the engine mount bolts ,A Cleveland has 2 bolts on each side the M engine has 4 mount bolts on each side.

OK, I am so danged confused. What motor is what? what is the 351 windsor, cleveland, modified???? I have a 79 f-150 and all I know for sure is it's a 351. How do I know which one I have for sure? I have looked at the vin but that is no help because it may not be the original engine. How can I tell for sure and which one is the better of the 3???