gsi head

[soup1]

the lad i navigate for is looking to get a new engine built for his nova
his engine builder told him to look for a gsi round port head.
would anyone here have the serial no from such a head i have a couple lying around and not sure what is what.some are already modified so cant tell by the ports:thumb:

[phazer]

It'll be one off a C16SE, the later GSi engine with dispak and map sensor. Pretty sure the engine code is stamped on the head somewhere.

[soup1]

found one with the stamp on it thanks