What is this part for?

[in2hotrods]

Cruisin' the 'bay and found this:

http://cgi.ebay.com/ebaymotors/NOS-1963 ... dZViewItem

Anybody know what it's used for?

 

[Asa]

looks like an adapter to add a PCV system to a vehicle that was made before PCV systems were standard

sorta