Projects help w/manifold ID

I have a duel quad manifold marked GM the # on it is 3739653 whats it from and whats it worth ??????

 

Late 50's - early 60's sbc dual 4bbl manifold. There should be a 4 digit date code on the intake as well. The condition of the manifold would give a better idea of what it might be worth.

 

first thing to do...

http://search.ebay.com/3739653_W0QQ_trksidZm37QQfromZR40

 

the ebay reference should tell you the story . great reference ! if its aluminum its probably corvette ........ steve