Any ideas what this is off of?

[notacarlo]

Heres a teaser...

Posted from the TurboBuick.Com mobile app

 

[BBCTURBO11]

LMAO !!!

 

[TurboDave]

I'll give you a hint...it is GM.

Posted from the TurboBuick.Com mobile app

Looks like a Mopar slant 6 to me.

 

[notacarlo]

Sorry, the hat itself is GM

Posted from the TurboBuick.Com mobile app

 

[TurboDave]

OK, I'll take your word for it, but...that's a Dodge slant six in the picture.

 

[Rubicon 327]

This might help with some confusion but not an answer to the Op's question

http://www.slantsix.org/forum/viewtopic.php?p=314983&sid=d9d6f40837ae0be368d8d18b2479be9d