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Head ID.......

891 views 7 replies 4 participants last post by  Rodnit 
#1 ·
Would like as much info as possible about this head.... Including good, bad, or otherwise....... :)

Thanks.
Rodnit
 

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#4 · (Edited)
Ok, here's some #s:

DH - 998991 GM63
Date code? - P233 Letter doesn't make sense...

PH - 399991 GM64
Date code? - R23 Again, doesn't make sense.....

The last number I'm assuming is either for '73 or '83...

Both have the same symbol as in the pic above........

Ponchos are much easier........

Hope this info helps
 

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#6 ·
The only thing that counts is the casting number 398991 there is no 399991 head this is a sometimes problem with reading the rough casting numbers. The 398991 is an early open chamber 75cc low compression head. They spin different part numbers since they came on 307s and 350s with different size valves and the last production had induction hardened seats. Unless you need them for a racing class they are just scrap metal. These gems were used between 1968 and 1976

Bogie
 
#7 ·
Thanks for the info..

Yep, casting numbers can be fun to figure out. That's why I posted pix too. If you click on the pix they enlarge pretty good. What about the other head? I thought the casting numbers should match, but not necessarily so?
 
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