Try removing the valve cover to inspect the head marking. That'll tell you what head it is and will give us something to go by. Pics would also help if you have a digital camera. Yeah let us know where you are. Having someone take a look couldn't hurt!
michael

here's the marker on my head:

where are you located?

aussie or america?
state?

yeah, I may try to find a complete motor here in the us, and just sorta start over....I havent really decided just yet...

hey buddy, congrats
<<<<----pic is my 1978 B210.
so your engine is an A-14 im geussing. i dont know where you can get a mexican intake manifold for the a-series. ive never even heard of a head made in mexico for the a-series. i could be wrong though. its probly a head off of somthing else.

o.k....so i was given a free 1978 Datsun, he called it a b210. Its a four door. (I am new to datsuns, but willing to learn) He lives in Mexico, and had the motor rebuilt there, which he called a 1.4l. It runs great at idle, but apparently has a vacum leak, which is stripping most of its power, and makes climbing hills, very slow....he told me that it was a mexican head, but has an american intake manifold, which does not line up correctly, therefore thats where the leak is comming from. I sprayed some starter fluid in the area, and sure enought, the rpms, pick up slightly, so it sounds feasible, or else something is wrong with the gasket. Does anyone know where I can pick up a mexican (and dont say mexico ) intake, or fix this? The local engine builder says he can machine an adaptor, but since I am a machinist I could do the same. does that sound like a way to go? I have not torn it down yet, and was gonna go buy an american gasket, open it up and compare to see what I am lookin at....has anyone run accross this before? thanks for your time guys!

p.s. also looking for a drivers front fender, shift know of any sort..and various odds and ends, this is gonna be me and the mrs commuter car, and it needs some tlc.