These parts were found in my 72 Datsun 510 wagon when I bought it. It had a short block L16. I did the ka24de swap, so I couldn't use the parts. Rather than throw them away, I thought I put it out to the real Datsun/ Nissan enthusiasts. I grew up as a Chevy guy and most chevy part related, just from pictures I knew what year and engine it came from or was interchangeable with. These parts were found in a box. Being this is a Datsun influenced forum I was expecting someone would recognize the parts/numbers. I apologize if you think I am lazy but truthfully I don't know.