Trying to determine what these heads are worth (if anything) and someone asked for the date codes.

Head 1 :
6917290
F21 8
GM4
T

Head 2 :
3827186
D N (an aarow inbetween the letters pointing to the D)
Canada
GM16
C49

I checked out the casting #'s but can't find anything on date codes.

Any help is appreciated.
Any idea on value (if any) would be great too.

I can't find either of those numbers, but instead of 3827186, I find 3927186. That one is 1967-70 camelhump head with accessory holes and 64cc chamber. It is the head used commonly on 4 bbl 327 and 350 and 302 for those years. This head came with 1.94 valves for lower performance applications, and 2.02 for the Z28 and Corvette stuff. I believe the 70 Z28 used this one.

Instead of 6917290 I find 3917290, and that one lists as 67-68 307 and 327. I don't have much information on it, but if it was used on the lower compression engines like the 307, it probably isn't quite as good as the other one.

Thanks. Guess its a good thing I'm not an accountant. http://www.nastyz28.com/ubb/smile.gif