What do you think it was off?

 

https://www.ebay.co.uk/itm/275438320845?mkevt=1&mkpid=0&emsid=e11051.m43.l1123&mkcid=26&ch=osgood&euid=afbf6e97e13f4074a0304a0b8539e8b7&bu=43141204892&osub=-1~1&crd=20220904121555&segname=11051

 

 

Two pictures show E88.  But it has injector notches.  I know that Nissan did things differently in Europe but I've not heard of that.  A fuel-injector E88 head.  I've heard of carb'ed N42 heads but not this.  Maybe @jonbill knows.  Or @EuroDat

 

I wonder what kind of valve seats it runs, steel? 

I think its a skyline head, Japanese market.

https://www.viczcar.com/forums/topic/17814-e88-efi-head/

Looks like maybe the Aussies got them in their Skylines too

Highly likely an Australian Skyline head. They wre also in Japan, but I don't know that market at all.

Skylines in Aus used the E88 on the L24(E) engines and later the (M)N47 heads.

The 260Z never had efi in Australia. They had the 260Z untill the 280ZX came along.