How can I tell if my engine is a 302 or a 351? Super Confused!
Ok, so I have always thought that my engine was a 302, now I am beginning to have my doubts. I purchased spark plugs for the car yesterday and they sold me Autolite 45's. When I pulled out the plugs they are Autolite 24's. Every plug I look up for a 351 is either a 24 or a 25. Does this mean I have a 351? How can you tell what size your engine is? The original motor that same in this 72 was a 6cylinder (thats what the vin says) so that menthod wont help me
Just an avvid 72 Fastback Owner
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I agree with the other posters with one exception, you may have a 351C engine. Does the thermostat housing point toward the front of the car or straight up?
When I bought a 351W engine to rebuild, I was worried that it would be a 302 instead of a 351, although I made sure it had the wider intake. It had 6 bolt valve covers instead of the 5 bolt covers that were supposed to be another way to identify a 351. This engine is from a 1987 Ford so I guess there are some exceptions. Once I had removed the heads and intake I could see the
"351" cast into the lifter valley.
So, for my curiosity, would a 351C have the same "351" casting in the lifter valley as the 351W?
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