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I am helping a buddy sell off some old car parts that he has been collecting for the last 30 years. He has an original factory GM crossram intake manifold with all the parts to install on a 1969 Z/28 but the top lid is a little strange. It has the winters snowflake but no date code and 2 part numbers on the top. 3941130 and 3965549. The only information I can find is that this belongs to a cross ram set up for a 302 hemi motor. I am a little suprised that it could bolt up to a regular cross ram base. Is there anything else I should look for before I advertise it?