I've searched and looked at the threads I can find on mustache bar mounting bushings, but I haven't come across information about the bushings I think my car originally came with.  Here is a pic of some I found online that are just like them.  Does anyone know what the original Nissan part numbers are for this "solid" style?

It's not original type. Could be a Nissan competitikn or an aftermarket " upgrade".

What's the bush in the mustache bar look like?

You probably saw this info from @kats during your search, but I just wanted to post the link for others that might find it useful. It does include most of the OEM part numbers for the early and later designs and has a lot of great pictures.

 

3 hours ago, EuroDat said:

It's not original type. Could be a Nissan competitikn or an aftermarket " upgrade".

What's the bush in the mustache bar look like?

The bushing in the mustache bar looked stock if I recall correctly.  They were removed and replaced with new old stock originals by the prior owner.   Here are pics showing what was on my car when I received it from the prior owner.  The previous owner had messed with them for sure - note one serrated type on top and one of the type I mention in the lower position - on each side:

 

 

Edited January 12, 20232 yr by inline6

Puzzling. Looking through the old thread that CanTechZ posted you can see the washers had slightly different functions in there design.

The lower bush loks like it is still in good condition

Inline6, 

The bushings in your first post were Nissan stock bushings consistent with those on my 1973Z. Unfortunately, that solid style bushing has been NLA for quite a while and all that was available were the serrated type  bushings. I posted about these bushings in January 2020, you can find that thread if you search on mustache bar bushings. I believe the correct upper bushing with the 16 mm hole is Nissan part no. 55474-N4300. The lower one has a 13 mm hole and is part no. 55475-E8300.  In was not able to locate any source of the solid bushings and used the later serrated ones which are supposed to be direct replacements. I've run with the later style bushings for two years and they seem to be fine.

 

1 hour ago, jpc3006 said:

Inline6, 

The bushings in your first post were Nissan stock bushings consistent with those on my 1973Z. Unfortunately, that solid style bushing has been NLA for quite a while and all that was available were the serrated type  bushings. I posted about these bushings in January 2020, you can find that thread if you search on mustache bar bushings. 

I believe the correct upper bushing with the 16 mm hole is Nissan part no. 55474-N4300. The lower one has a 13 mm hole and is part no. 55475-E8300.  In was not able to locate any source of the solid bushings and used the later serrated ones which are supposed to be direct replacements. I've run with the later style bushings for two years and they seem to be fine.

 

Were you able to find new serrated bushings?

I was able to find a third solid rubber bushing in the parts that came with the car.  But, I don't have a fourth.  I see two NOS serrated ones (lowers) that I can purchase.  So, I should probably jump on those.

 

@patcon - do you have any good "solid" upper ones?

Let me look

22 hours ago, inline6 said:

@patcon - do you have any good "solid" upper ones?

I have these. Are any of these correct? Some of them are pretty hard

I believe these two (blue arrows) are the right ones.  The upper ones have larger diameter holes than the lower ones.  The one in the top left corner of your pic clearly has a smaller diameter hole.  Can you measure the diameter of the hole in those 3?  If those two with the blue arrows have the large hole, they are what I need.  Doesn't matter if they are hard. 

Here are the ones I currently have.  The third one I found with parts that came with my car is another lower one.  The ones in grey primer are the serrated ones.