Author Topic: 351-C Heads  (Read 486 times)

gt350bp

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351-C Heads
« on: July 15, 2022, 02:37:19 PM »
Any 351-C experts able to help with identifying 4-V quench heads? The car I'm looking at has a 4 cast into the head next to the valve cover flange. I remember that there are two markings. One with just the 4 and another with a 4 and a dot casting. I thought the 4 with a dot are the quench heads for higher compression.

Can anyone confirm?

Thank you.

Don
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427heaven

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Re: 351-C Heads
« Reply #1 on: July 15, 2022, 04:51:56 PM »
99.3 percent of the time the plain 4 is the closed chambered quench head. The 4 dot is the open chamber not the ones everybody wants. Good Luck on your purchase

gt350bp

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Re: 351-C Heads
« Reply #2 on: July 15, 2022, 05:47:54 PM »
Thank you! I checked with a friend that hs an M-code and his heads are marked with the 4 also. Appreciate our help

Don
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TA Coupe

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Re: 351-C Heads
« Reply #3 on: July 15, 2022, 08:31:16 PM »
My NOS boss 351 head has a 4 and the dot. Forum is not accepting my pictures at the moment otherwise I would show you..

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98SVT - was 06GT

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Re: 351-C Heads
« Reply #4 on: July 15, 2022, 09:17:08 PM »
From the book - FORD 351 CLEVELAND ENGINES: HOW TO BUILD FOR MAX PERFORMANCE  PDF link - https://freepdf-books.com/ford-351-cleveland-engines-how-to-build-for-max-performance/

.......“4” means a 4-barrel head with large ports. The dome indicates an open-chamber head. If there’s no dome (indicated by a dot), you’ve found closed-chamber heads.......

Best way is to look at the combustion chamber as you can see there are no hard and fast rules - https://www.youtube.com/watch?v=X61TqyLb8gw 

Even the blocks can get confusing. A lot of Aussie 2 bolt pillow blocks have been drilled for 4 bolts and passed off as NASCAR blocks. https://www.youtube.com/watch?v=d8ewp2FVn40

The Pantera Forum has a lot of 351C info.

« Last Edit: July 15, 2022, 09:42:23 PM by 98SVT - was 06GT »
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gt350bp

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Re: 351-C Heads
« Reply #5 on: July 16, 2022, 08:50:52 AM »
Thanks for all the good info! The car I'm looking at appears to have the quench heads when the engine was changed, as it is a H-code.

Don
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