Ok, I pulled my wrecking yard engine apart last night. I bought it because it had several interesting features about it. It was in a 1979 wagon with a 5 spreed, I got the 5 speeds too. Not too bad for $120. The block did not have the normal A14 cast in it, it was stamped on a pad above where you'd find the A14 cast. It initially caught my eye because it has a silver foil sticker on the oil cap with Japanese writing on it. I believe it is a Japanese domestic engine that was brought here as one of those low mileage replacement motors. A Datsun mechanic friend of mine that serviced these cars in the 80's confirmed this when he first saw it. He said he'd seen alot of them. As I checked this engine out at the wrecking yard, I noticed it had no emission equipment on it except a pcv. In fact, there are no provisions for putting an egr, air pump or anything like that. The intake and exhaust manifolds are very "clean" without any of the extra passages, ports and fittings. It has the H75 head with oval ports and the center stud. When looking at the Datsun heads, the H72 came out in the US in the 1978 B210GX. In 1979 all the heads had some type of emission equipment. The #''s on the Datsun heads, (H72, H95, etc) increase as the later versions came out and superceded the earlier versions in production cars. From this I am concluding that the H75 head is later than the H72 and also being without emission equipment, is preferable to the H72 as I believe it would have had some design revisions. The tech section lists the H75 as being a single or dual carb head. If you have an H75, you might want to hold on to it. After I clean up the H75, I'll get the H72 off the shelf and cc them both, maybe take a few pictures.


Also, I was going to get my flywheel surfaced and I couldn't find the spec for the step in the flywheel. Factory spec is 0.005-0.008" step proud where the disk contacts the flyhweel. Most outfits just grind the flywheel flat. If you do grind it flat, the clutch is going to slip before long because you can't get enough clamping pressure.