Head casting numbers

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Jul 10, 2010
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My Car
1972 Coupe
2001 Coupe
k20c1.jpg


Anybody recognize these head numbers? Supposedly on an early 70s non mustang cleveland block.

 
351m and 351c motor mounts wayy different.


plus 351m shares same bell bolt pattern as the 400 which is also the same as the 429/460. 351c shares the 289/302/351w bell bolt pattern and motor mounts.

 
Last edited by a moderator:
M/400 block has a raised up thermostat housing, and 99% of them have a standing rib to the side of the distributor

351m400.jpg


How about casting numbers in the starter area of the block?

 
Last edited by a moderator:
M/400 block has a raised up thermostat housing, and 99% of them have a standing rib to the side of the distributor

351m400.jpg


How about casting numbers in the starter area of the block?
Thanks! I think I would have 'noticed' the difference even if I didn't know why. That's a great way to quickly tell.

 
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