Aluminum 3946074 heads

[TFox07]

I have a set of these heads with "Motion" stamped on them. Is it possible they are Baldwin Motion heads? If so, what other signs should I look for, and will that increase the value? I noticed these heads on eBay go between 4 and 5K.

[Lee Stewart]

Can you provide some photos for us to look at?

[wheelhop]

The value of the heads will be in their condition and the dates. 1969 and early 1970 dates make them more valuable.
I have never heard of "Motion" being stamped on aluminum heads on Motion cars but I am certainly not an expert.