Zed Head

I deviated from CO's point about nothing moving if the gears are engaged and the vehicle is not moving. My post above doesn't really fit the "vehicle not moving" scenario.

That does sound a like a spinny noise. Too bad you spread your threads around I'm pretty sure I saw one about the pilot bushing. How did the pilot bushing fit? Did you put a dab of grease on it? The noise kind of sounds like what I would imagine a dry and/or loose pilot bushing to sound like. It has a certain wobble to it. But throwout bearing seems possible too. You didn't record third and fourth so I assume that they don't make the noise. Or, maybe the needle bearings around 1 and 2. 1 and 2 also share the same coupling sleeve. The guys that have rebuilt theirs would know more about that possibility.

A couple came up today. A 78 in the 20's. A 72 still climbing. https://bringatrailer.com/listing/1978-datsun-280z-128/ No reserve - https://bringatrailer.com/listing/1972-datsun-240z-232/

Here's an actual example.

Like this?

Looks like your question now is "what brand"? Looks like the Exedy's only come with a bearing but no sleeve. So you'll want to measure and try to hit 92mm stack height. Or measure the old setup and match it. It would be interesting to see how close it is to 92mm.

Considering all of the potential problems, if I was buying a clutch kit I would just make sure that it came with a throwout bearing sleeve/collar. That's where people run in to problems, a mismatch between the sleeve and the pressure plate. Are you buying a flywheel too or having yours turned? 225mm flywheels are hard to find. You might find that you'll have to go 240mm (but it should already be 240 like you said) unless you get a Fidanza flywheel. The transmission that you use doesn't matter as long as it's a 71B type. That goes all the way through 1983. But, if you decide to change the differential to match the gears of a later model 5 speed you'll find that the 1975 year has an oddball pinion flange pattern on the diff.

Your promotion would have more impact if you picked an item of misinformation and corrected it. Also not sure that the author can define his own work as definitive.

If it only happens in 1st and 2nd but not 3rd or 4th then it seems likely to be a transmission issue. The clutch operation is the same for all gears. Any chance it's actually a vibration coming through the shift lever? That's a common thing for 1st and 2nd. Both on the left side of the pattern. I wouldn't worry too much about it. Keep track of it, if starts getting worse you can take action.

What transmission did you end up putting in the car?

73 shows similar but they actually show a connection between the ground circuits. Seems like there would be a sliding contact like for the turn signals, to ensure a ground circuit. Just offering another possibility. There might something buried under the mechanism. I had mine apart long ago but can't remember what was underneath. Whatever it is would not pass much current. Just enough to trip the relay.

The 76 wiring diagram shows the ground through the combination switch.

Zero to plus or zero to minus. Might be that you have a short or an open circuit somewhere.

Check your points and the coil. Might be that the various problems are related. Check coil resistance of the primary and secondary circuits, verify supply voltage, reset the points gap, or, ideally, set the dwell. Verify a good ground for the points. Spark strength is all about current through the coil. Check the advance mechanisms in the distributor. Verify proper ignition timing. Retarded timing can kill engine performance. Once you know that spark and timing are good, you can focus on carburetion.

I edited right after I posted. Was hoping I'd beat you to it. Sent the person an email about the year and title. See what happens.

I never really look at those side bars, I missed it. I'd want to see it. Still. $4500. Has wheels, looks like it rolls. Seats. Engine. Etc. Probably an automatic. Edit - never mind, that's over there too. Even better. Manual, clean, rolls. good project.

Still looks like a good deal. Bet he doesn't have a title.

Here's a one owner 74. I think you guys are right. A new mystery... https://bringatrailer.com/listing/1974-datsun-260z-49/

Is it the front bumper? The big gap?

What do you see that makes you think that? Seriously, what are you guys looking at?

What do you see that makes you think that? The numerous red wires connected ground is kind of scary.

That looks like a great buy even with just three pictures. Maybe @Racer X needs one more for his collection. That's a classic Edelbrock filter. https://www.edelbrock.com/pro-flo-1000-series-chrome-air-cleaner-with-foam-element-with-5-1-8-air-horn-1002.html

I think that they were aware. Have you ever seen a torn or split bushing? Here's 1973:

The Nissan bushing does not move/spin. It flexes. That's why you're supposed to tighten the bolt with the car on the ground.