Zed Head

Do an external ocular assessment before beginning the teardown. Did anyone mention the other book, How to Modify... https://www.amazon.com/Modify-Your-Nissan-Datsun-Engine/dp/1931128049/ref=sr_1_1?keywords=how+to+modify+your+datsun&qid=1550431588&s=automotive&sr=1-1-catcorr

That is true. The adapter makes the wires at the alternator correct. So you'd just need to get those right for the plug at the GM SI. Some of the other high output alternators, like ZSpecialties' 140 amp unit, are "one-wire". Still waiting for him to finish his web site. https://www.datsunstore.com/

I think that the GM alternators are typically run as "one wire" systems. The S(ense) wire is just shorted to the B(attery) wire. Edit - and the L(amp) wire. All one wire. So the alternator will produce current. Other wires run through the VR. Haven't really followed them out. Best beware.

That is not a fusible link, it's just a wire. All of the wire ends down there are exposed so a little bit more won't matter. Do you have a picture of the part on your car that was melted? The picture you posted must be from somewhere else.

Car videos always have something funny in them. I like where he says "dialed in properly, rides well" as they bounce off the bump stops. 2:40. And apparently no seat belt laws in Florida. The cops didn't say a word. This is a little worrisome.

You can still get external voltage regulators. Here's a link, with pictures https://www.rockauto.com/en/catalog/nissan,1971,240z,2.4l+l6,1209158,electrical,voltage+regulator,4884. https://www.rockauto.com/en/moreinfo.php?pk=532221&cc=1209158&jsn=359

Let the hoarding begin...

The 202k engine has a "match box" distributor. Might be a 79 ZX engine. So it will have a ZX intake and exhaust manifold. One thing to think about. Your exhaust pipe won't fit it, and the AFM hoses are different size. The 148k looks pretty good. They're both intact. You might loosen a hose clamp and smell the fuel. Might be a clue about how long they've been sitting. Looks like your like-for-like swap option is gone, the 76 N42, or maybe you haven't seen it yet. If they come with a warranty you might plan ahead to set them up and make them run. With a can of ether and a battery you could fire them up on distributor power alone. You'll need a way to spin though if you don't have a spare transmission. I wired up my spare EFI harness on an engine I bought at on a half-price day at the local yard, to make sure it was decent and I didn't need to return it. It was fun.

I f the 0 is actually an 8...

http://www.zhome.com/IZCC/ZRegisters/classic.htm

I know you're probably restoring so want things to look right. So maybe an extra filer is not describable. But if the new filters, which are invisible once installed, don't filter to a finer level or the same level as the "strainer" aren't they kind of pointless? I wonder what the material on the inside of the strainer is? This is from 1972, I can't find earlier stuff.

Many carbs use a sintered brass filter (might have been discussed, there's a lot of pages in this thread...). Find the right size and devise a way to seal and you might have a more durable replica filter. https://www.summitracing.com/parts/hly-162-500?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-holley&gclid=EAIaIQobChMI2f6ynZa84AIVg-NkCh0buwKbEAQYASABEgJZG_D_BwE These guys have a huge selection - http://www.hengko.com/

I missed the fact that he was missing the door plate. My misstake. There's a list of VIN's out there somewhere. His slot in the table might tell.

The build date might mean something.

The P90 head was usually, but not always, used on the turbo engines. If you see a P90 head you expect dished pistons in the block. The P79 head was the 280ZX NA head. Somebody might have swapped a turbo engine in to an NA car. All they'd have to do is remove the turbo parts. So it would end up as a low compression ratio NA engine. Your EFI stuff will work. It will work best if you keep everything factory stock. You said it would be nice to have more power. One other consideration is the "lifter", actually the rocker arm pivots. Most P90 heads used hydraulic rocker arm pivots. You can swap them to mechanical using Timesert thread inserts. Just one more mechanical thing to do of the hydraulics don't work right. They do wear out eventually. I'm not going to vote. No idea what you enjoy. My method is to go stare at the engines and poke around. You might find some show stoppers that just leave one. Look through the spark plug holes, and the oil filler cap. Take the valve cover off if he lets you. If they all have dished pistons then only the 76 engine will give the CR that you probably want for an NA engine. And, from what I've been reading over the last year or two, pistons are getting harder to find. The old days of getting cylinders bored and a set of oversize pistons might be gone. This guy posted a lot of interesting stuff. People don't always agree with everything he says but it's still informative. http://datsunzgarage.us/p90/ Don't overlook that your 77 engine's head can be used on any of those engines. You could pick the best short block of the P90 head engines to be sure that the pistons are reusable.

Of course, this is just a fun distraction, right? Not really worried about function. There's a ton of other ways to get filtered fuel to the carbs.

That's all? What did you do? How did it run? Did it idle?

p.s. if you get the turbo manifold you can make any NA engine a turbo engine, using Megasquirt. When examining the engines don't forget the little stuff like injectors, broken bolts/studs, water pump quality. The nickel and dime stuff.

Wow, that's some pressure. I'm not really the turbo guy though, I just read a lot. I always recommend picking the project that has what you like to do in it. To do a turbo engine right you really need to enjoy working on engine management, the wring, computer, AFM, associated turbo parts like the blow-off valve, etc. You need to be very techy. If you're not going to get the extra 1982 parts, like the computer, wiring harness and AFM from the ZX, then you'll need to choose an engine management system. 1982 engine management is pretty primitive though. Most guys end up with Megasquirt, for example. If you go that route then you'll need to tune it, using a computer and adjusting various tuning values. Very computery. @cgsheen1 has some definite views on turbo engine swaps, he's done a few. His view, as I recall, is that you'll learn a lot trying to use the 82 ZX engine management but in the end you'll want Megasquirt or a later model Nissan system. If you want to add power to an NA engine you'll probably need Megasquirt, again. The stock EFI system isn't tunable. Hard to get them running well after power mods, like a cam, apparently. The opposite is carbs of course. Then all of the old school stuff applies. If you're going to have the engine rebuilt anyway, the choice kind of boils down to carbs or computers. Which makes you feel best? By the way, the P90 head engine non-turbo might be a low compression dished piston engine. A turbo engine with no turbo. So it might need new pistons if you want to get some pep out of it. If you can tell by examination which engine seems least abused, that might be the way to go. Less money to make it right. Alright, the coffee has worn off...

This guy has good selection of all parts Z. https://zcardepot.com/collections/cooling-heating

How about a piece of Brillo pad. Actually, McMaster Carr has some neat stuff. Just thinking outside the automotive box. https://www.mcmaster.com/mufflers https://www.mcmaster.com/breather-vents

I wonder if they mean oil from Alabama... Or oil that moves.

Stuff from the 72 FSM. Might be similar in your new manual.

I couldn't find any carb stuff in the 70 or 71 FSM's. But 72 might get you started. Those are round top SU's I believe. ZTherapy sells a CD that describes how to make them work too. https://www.classiczcars.com/files/category/11-240z/ Click the "Spotter's Guide" in this link - http://www.ztherapy.com/

This is from the 72 FSM. "Suction pistons". The early FSM's are sparse on details. I don't even know if yours has SU's. Didn't mean to stomp on 7tooZ's post. Coincidence.