High compression head ?

[B0B]

My friend has a 31 coupe new to him I was helping work on it he thinks it may have a high compression head the only marking on it is the number 10 on top near to the water inlet the numbers are rather big about 3/4 inch high . Does anyone know if this is a high compression head or a stock original ? I never saw one with the number 10 on it ?
Thanks guys b0b

 

[James Rogers]

Probably not. A compression check will show if it is anything over stock which is normally 60-65# PSI.

 

[Bob Bidonde]

A compression test will answer the question.

 

[V4F]

I have a 7-1 , compression is about 125#

 

[johnbuckley]

A compression test will answer the question.

What are the comp readings for standard and the various HC heads Bob?

 

[Y-Blockhead]

I believe mine is a stock head, last compression test was 75# in all.

 

[Tom Endy]

The Snyder high compression heads usually have two round casting marks on the top surface of the head. Each is about the diameter of a dime and they are a few inches apart. They can be located at different places depending on the lot.

Tom Endy

 

[B0B]

Thanks Guys for your comments . My friend does not have a compression tester he lives about 40 miles from me . I just thought that someone would know what the number 10 means that is on the head . B0B