NewZed

What is the voltage on the G and W pins doing while you're cranking the engine? I've wondered why the HEI module works in this application, since it is designed to use a falling voltage on either G or W pins (I can't remember or never knew which pin does what) to trigger when it crosses zero. I could be wrong here also, maybe the 4 pin uses a rising crossing. Regardless, even though it works often, it's not the way it was designed to be used. I would guess that a square wave getting to zero is what's triggering the spark in this usage. You might have a ground loop on the G and/or W pins that never lets the voltage get to zero, or something along those lines. Something to look at. What the module expects is well-described in its usage with the VR distributor, in the Megamanual. You might read through that section and see if you can figure out what's missing in your application.

Put it together, blue up the wiping areas and run it through a few revolutions by hand. If the pattern is weak on one side or shows a ridge or depression or that the cam is riding off of the already worn area in to a new area, then you could assume that you'll have a problem with uneven pressure distribution wearing spots on a cam lobe or two. If everything comes out looking great, then you'll still wonder, but at least you'll know more. Or you might find one or two obviously bad, that you can focus on fixing. Or you can mix and match until you like the pattern. That's what I would do if I wanted to try to re-use the old rocker arms, but I've never put a head together so could be way off track.

The tape measure in your picture shows 15 3/8".

The thermostat controls engine heating by restricting coolant flow, to keep heat in the engine block so that it will reach designed operating temperature. You're in a good spot, just put a good thermostat back in, and you should be golden.

"advice" Edit - You're really getting way too upset for a simple request to improve your post. I'll bow out now and let anyone that wants to give you a hand go ahead and do so. You might read a few of the threads in the New Members forum before posting anymore though, they will really help you out. This forum has a few more rules than most, which, in my opinion, makes it one of the better forums on the internet. http://forums.hybridz.org/index.php/forum/68-new-members-forum/

For posterity... By the way, this post IS much easier to read the your first one. Was it that hard to do?

It was a test. You failed.

The ECU, AFM, distributor and manifolds (with BCDD and various vacuum operated devices) that you're using with the F54/P90 engine will make a big difference. The turbo stuff won't work right, and the original 1975 stuff would need some tweaking. What are you using?

Advice - Take some time to format your words so that people can read them. Too much work to read your blob of letters.

You can get new plastic bushings for the old style shifters from Courtesy Parts or zpecialties.com if you decide to go that route. They might also have new bushings for your ZX style shifter. I would call both if they don't show on the web site. Both easy to work with, and quick shipping. http://www.courtesyparts.com/ www.zspecialties.com Old style- http://www.datsunstore.com/product_info.php/pName/shift-bushings-stock-7280

Check that carpet isn't holding the vent doors open. The ones that point at your feet.

If you're handy and have the tools, this thread offers an option. From Hybridz member cygnusx1 - http://forums.hybridz.org/index.php/topic/34969-cv-adapter-print/page__p__452891__hl__%2Badapter+%2Bdrawing__fromsearch__1#entry452891

Maybe the clutch dust that worked it's way in before has ruined the seals on the Tilton MC. Your description of erratic behavior sounds like bad seals somewhere. I re-read your thread and didn't see "new" or "rebuilt" master cylinder in there. It's the only old part left.

Pretty sure I've seen NA ZX's with CV half-shafts and seen it reported on other forums, and picked up a diff myself with CV shafts that the guy pulled from his NA ZX. Maybe it was an option, or an upgrade. But, even so, there appears to only one type of CV half-shaft available for the ZX's, so irrelevant unless you're looking for CV's.

No guarantees. And my TEMP reading went down with a higher oil pressure reading, not up. If you're not getting a TEMP reading at all, it's probably your temperature sensor, up front. Have you measured resistance through the sensor? It should be between zero and infinity but not either.

If it's a piece of shift fork, the aluminum will settle out if you let the fluid sit. Put a pint in a jar and see what ends up on the bottom.

Sounds like a failing hard drive. They're pretty cheap. Worth buying a new one and cloning the old one before it dies.

I've seen milky gray from ground up aluminum. You might have a broken shift fork. Fifth uses the same fork as reverse, how is shifting in to fifth? The remaining pieces of the fork will still shift the gears, but the broken piece(s) floating around get ground up in the gears.

The PCV valve is more complicated than it looks. From what I can figure out,the spring is actually tuned for the application. In most cases, the valve sits slightly open, and is moved either way by vacuum or backfire (or boost, I assume). You should probably be able to blow through it when it's off the engine. I know that you can blow through the NA valves, I doubt that turbo valves are much different, if at all, at zero intake vacuum (between WOT and boost). Google some images of "PCV valve" and you'll get some ideas.

Keep looking? Post an E-Bay link so people know what you're looking at? Start a Parts Wanted thread? Speedometer replacement threads are rare, yours if the first I've seen. I doubt that many people even know the speedometer has a green connector and "relay". The "relay" might be the speed sensor for the BCDD, which is only used on EFI engines, starting in 1975.

I've seen a few threads on in-tank options. Search "in-tank" on all forums and you'll find some threads. I don't think that the whole ZX tank will fit in a Z. The dimensions are wrong.

Isn't the first answer - more limited slip additive? My mistake - re John C's Post #6.

Don't forget RockAuto. They show some low prices there.

Just saw your post on another forum. If you can't decide, you should just sell it. You'll have two cars, therefore twice as many decisions to make. You might consider giving it away, then you won't have to decide on a price. Use www.craiglist.org

Search "ford valve seals" something will come up. Don't know if they're cheaper.