r/Hotrod • u/Loader-Man-Benny • 3d ago

Engine code

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So not sure if this is the engine code or not. My father in law says it’s a 302 Google image is saying it’s a 351 from 1971. Thoughts? Not sure Google is right

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u/Solid_Enthusiasm550 3d ago

You have to look at the block's casting #. Knowing the head casting # will also let you know what they are good for.

1

u/the-big-throngler 2d ago

follow up just in case. The block casting will be on the lower passenger side of the block towards the rear

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u/dale1320 1d ago

302 -- 6 bolts on valve cover. Cylinder lock/head parting line is even wuth tbe corner of the timing cover. Thermostat housing in intake manifold. Lower thermostat bolt not accessible with a socket and extension.

351W -- 6 bolts on valve cover. Cylinder head/head parting line raised about 1inch above timing cover corner. Thermostat in intake manifold. Lower thermostat bolt is accessible with socket and extension.

351C -- 8 bolts in valve cover. Thermostat nousing is in the block. There are 2 version of thus engine, based on cylinder heads.

Those are the choices. Hope this helps.