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Discussion Starter #1
I picked up a set of 186 heads today at the swap meet, I wanted to know how to tell if they have hardend seats.....Is there an easy way ???

John
 

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Johnny, they were all deep hardened after about '73 or so and it is a hit or miss deal from about '71 to '73 if I have this right.

Therefore you can go over to Mortec and check out which years the heads were used and it will give you a better handle on this..

But you will need the head casting number.

pdq67
 

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Discussion Starter #4
The heads are a 1969 1970 vintage....
 
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