Heres one for the major Z freaks (no offense) I have HLS-30 165246, near as I can tell from the Z registries that would make it a 06-73 production car, but I can't be sure as my door jamb tag is missing. So the question is , is it a 06-73 production car and is that an early or late 73 car? I understand from searching this and other sites that that makes a difference in which tach the car is equipped with.

I've never heard of differences between early or late '73 240Zs. All 240Z tachs are the same 4-wire inductive loop type, as far as I know.

Yes Leon, there IS a difference.

Just before releasing the 260 in the US, the tachs were replaced with the 3 wire variety, but at what point/date is the hard one to pinpoint.

The only sure way I know is to look at the back of your tach to see if it does indeed have the LOOP held down by the sensor or not.

I know there are pictures that show it, but don't know where they are right off the bat.

E

The reason I ask is, I just bought this http://www.ebay.com/itm/260888364903?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 and wanted to be sure, before I bid it up higher than I could get out of, if it didn't fit my car. Since I got the thing for $26. after shipping with no opposing bidders it's basically a mute point. Even if this virgin ebayer sends me a broken tach, for that price there is no way to get hurt, I can have it rebuilt and still drive my car while it's getting done. SCORE!

According to Carl Beck's list your # should fall in the 6-73.

The highest May 73 number is HLS30-160968,

The highest June 73 number is HLS30-167320.

Bonzi Lon

Thanks Bonzi, thats sort of what I got off of the registry, not in as much detail though. So does anyone know when the sepperation was for early vs. late in 73? Just in case I run into that question in future parts needs.

Yes Leon, there IS a difference.

Just before releasing the 260 in the US, the tachs were replaced with the 3 wire variety, but at what point/date is the hard one to pinpoint.

The only sure way I know is to look at the back of your tach to see if it does indeed have the LOOP held down by the sensor or not.

I know there are pictures that show it, but don't know where they are right off the bat.

E

http://www.classiczcars.com/forums/showthread.php?36809-73-Tach-Differences-3-or-4-wire&highlight=73+tach

Looking at that thread, it looks like I have a 3 wire, So I guess I'll have the one I just bought tested and resell it.

Well, so much for not getting hurt on a $26.00 tach, the idiot that I bought the tach from never accepted the payment or responded to my numberous attempts to contact him. I canceled payment and now my paypal account is all screwed up, so I can't send payment to the seller of a set (speedo + tach) that I bought the other day. This is going to end up killing my 100% ebay rating. I will never try to deal with a newbie on ebay again, live and learn.

I was talking to a friend who was a Z specialist back in the day, he "seemed to recall", as he put it, getting the service bulliten on the wiring harness change in 03/73 effective date of 04/73. He said he likely still has it in his files and is going to see if he can find that paperwork for us.

He also has an extensive collection of NOS S30 parts in storage that he has agreed to let me plunder durring his 2 week holiday shut down. Also, he has a new, in the crate, 5 speed transmission that I can have if I agree to "get it the f##k out of his shop." To which I replied, "when can I get in to remove it", Monday at 8:00 am it will be mine. He says there are so many of these laying around on the east coast, with no cars to put them in that it's not even trying to sell it.

BTW, I got my paypal straitend out and should have my tach and speedo in a few days.