Re: The build date project
 

Without a secondary sort feature we have to sort by date or by VIN but not both obviously. With it being a build date project, I would be more inclined to have the date sort have priority. Other wise you would have two sets of dates for Flint for 71 and 72. I am not saying that is a bad idea. I think we will continue to learn more about the pattern and hope to identify why they jumped to 2F3 then back to 2F1.

Of course we could just utilize 2 sorts for Flint? I am sure we are yet to identify all the anomalies.

Re: The build date project
 

70 chevy; 0S142568; 1/70
72 chevy; 2Z147088; 3/72

Re: The build date project
 

71 chevy; 1J623881; 2/71

Re: The build date project
 

Here's some information. Blue font is useful, black is gibberish:

If you haven't already you might add 1972 Z161544 with a build date 04/19/1972. He posted it in 2013, fairly well preserved build sheet too - gave me something to work with. I went through this to attempt to confirm my well ventilated 72 Super Z146839 was built in Mar. though perhaps Feb. using the most conservative dates & numbers available. I'm only assuming the factory didn't skip sequences.

Between March 24, 1972 and April 19, 1972 there were 7351 Z Chevy's built. That's the low end, divided by 27 days instead of 26, but a solid guide. That's 272 trucks per day and 8236 per month.

Between April 19, 1972 and sometime later in April (Mystery April Date, "MAD") there were 2502 Z Chevy's built.

If it's assumed MAD is the last day in April, then 9853 Z Chevys were built between March 24,1972 & April 30, 1972. That's on the low-end because I must be MAD, I mean the MAD is April 30th.

Using the number 9853, that's 259 trucks per day or 7908 trucks a month for the period. Strictly a guess, personally I think this is somewhat misleading, not sure why I went here;) EDIT: Irony, I now see that Z164046 has a 04/28/72 build date. That was a Friday and 259 pencils out after all.

Using the 03/24/1972 date (Z154193) for my 72 Super (Z146839) there's a difference of 7354 trucks. If March 1st is assumed through 03/24/72, then at 259 (minimum) trucks per day that's 6216 trucks. Bummer, still 1K short. If 272 trucks per day is used then still short 800.

That said my sticker is faded, just at that corner too, go figure. But a magnifying glass says "/72" and I'm mostly sure the month is "3". It's so faded it could be gone next month. In my edgeucated opinion (90/10+) Z146839 is March 1972, though if you add it asterisk at your discretion.

Re: The build date project
 

Fun with math no doubt.
I looked at two of the closest dates available with a decent spread: (3-24) Z154193 and (4-28) Z163961. That is either 34 or 36 days (34 if you consider Z154193 was built at the end of the day and Z163961 was built at the beginning of the day). Using those numbers, the average is 287 trucks a day. 287 x 24 (March 1 to Mach 24) = 6888 trucks. Backing up from 3-24, the earliest for March would be Z147305.

Certainly Z146839 was built in either February or March. I'll add an asterisk, ? for the month and a note. Ill bet we can make better estimates soon.

Re: The build date project
 

Reading some suggestions above, especially dates, you might consider a different format. Don't get me wrong, this effort by the two is outstanding, I'm reminded of the effort put into indexing the assembly manual, all we had to do was number 500+ pages;)

Perhaps this is a usable format. You can sort by any column and I think easier to manager by the task force. Edited:

Date (zero=no day): March 0, 1971
Factory: Fremont71 (the reason for the year is for sorting - I like how you guy's separate factory & year & this will do that. See example below if interested.)
Year: 1971 Perhaps redundant if year is added to factory, but strikes me valuable as a sort option)
Chevy/GMC (gay man's chevy:lol:): Chevy, Suburban etc. (See post 119, might be better to add Suburban, Blazers as a note or as another column to sort by, e.g. "Other").
Vin: Zxxxxxx (Not sure you need "Z" but it sorts anyway).
Notes: 71Chevy402 is a bum

Flint70
Flint71
Flint72
Fremont70
Fremont71
Fremont72

On a side, if using Excel for example, the shorter the better. Sometimes it's necessary to put columns between columns to paste right, using symbols. For example:

01/01/1970...Fremont70...1970...Chevy...Z123456...Blank*...71Chevy402 is a bum.

*Blank is a spot for Suburban and that, because blanks will throw off your paste. N/A maybe, but it's not as if you're registering every type.

Edited again, cough). The list of your factories/years and that is a nice placeholder so to speak, but I wouldn't add them to your chart until a truck comes up. Just some suggestions, I'm a bum but long edgeucation in data structure & reports was enough to be happy to leave, with CDO and perhaps PTSD too, them (*&(*)&^ are crazy:lol: especially meetings.

I agree. If a picture was worth a darn I'd take it. The sticker is just too faded. But again, I believe it's a three. If it's March you can bet it was the first week if not day. Heck with it, I took a pic anyway, that looks like a three. A two is shaped differently:lol: If true, and I think it is, that's approx. 306 per day and a whopping 9200 a month 72 Chevy Z at the time.

We need a forensic to pipe in, there's got to be a chemical some sort.

Re: The build date project
 

71CHEVYSHORTBED402,
I'm wondering if there are multiple layers of your sticker that maybe could be separated at the "date" corner. Perhaps the clear (that's no so clear now) top layer could be separated enough to reveal the next layer? It sorta looks like the layers became separated in that corner in your pics.

Perhaps this could risk more damage than it's worth, so proceed with caution if you decide to do this at all.


And I agree, it looks like a 3.

Re: The build date project
 

If you can send me the original photo. The chemicals can be destructive. But I think I see a "3".
PM sent

Re: The build date project
 

That’s what it looks like to me as well.

Re: The build date project
 

My 72 C10:
A149453

With my truck being an Atlanta built truck and member Pro299 truck being an Atlanta truck built 3/72, I would assume mine could possibly also have a build date of 3/72.

Re: The build date project
 

I agree it might look that way, but pretty sure it's not multiple layers. More water damage at that corner, IMO. I'll double check though, though I'm I'm feeling a little suspect now:lol: Truck has a build sheet, would have to pull the seat to pull it, but I'm confident it would be like pulling a dry leaf.
Just touching it some flaked off.

:lol:

Re: The build date project
 

This sticker is on a door I bought recently from a classic car wrecking yard just a few miles up the road from where I live. The date looks like 2/71 and the last six digits of the VIN look like 625107. Can't see the rest. Seems likely it is a Fremont truck.

Re: The build date project
 

Does it have the metal vin on the driver door jamb or the SPID on the glove box you could verify the last 8 of VIN?

Re: The build date project
 

Sorry, I just have the door, and the owner of the wrecking yard is very difficult to get a hold of. Otherwise, I'd got take a look.

Re: The build date project
 

It's certainly consistent with an early Feb Z build.

From post 2:
1Z624290 = 1/27/71 (Build Sheet)

Re: The build date project
 

Here's the build sheet from a 72 Cheyenne Super I used to own.

CCE142Z148035
09 03-06-72

Re: The build date project
 

Thanks for posting this up. If at all possible you find your self in that yard again, try and get the year and plant digits. I agree it looks like it could be a Fremont truck but I’m hesitant to put it up unless we can verify it. Thanks.
Tonight I Added some pm’d info as well as what has been posted up in the last few days. I’ve got a little more pm’d stuff to add in the coming days.
Thanks everyone!

Re: The build date project
 

Sure a lot of March & April Z Chevy represented. Very cool, remove any asterisk from Z146839 if you care to, I shouldn't need a forensic after all:lol: That serial number is only 1146 off mine with three days labor to build it assuming Sat. Sun. off.

If a five day work week that factory punched out 450ish trucks per day at the time.

Re: The build date project
 

It's hard to say, because it varied based on basic line rate, number of production shifts, overtime (both scheduled and extemporaneous* per day, and number of days per week), line stoppages due to mechanical breakdowns or union activity (aka, strikes), etc.

You'd have to know the specifics surrounding the timeframe you are studying - or - feed the information back in based on an activity like you are constructing here.

Basically - Flint (Line 1) and Fremont were your high volume plants, typically around 60 jobs per hour. St Louis and the other plants were typically a little slower, like 45 jph; Flint Line 2 was normally around 36 jph. Fremont passenger car side (and Pontiac Motor Division, passenger cars) could be as high as 70 jph and three production shifts - but trucks would not run three shifts as far as I know.

So - on the low end, at 60 per hour, you might have 60 jph x 8 hours = 480 trucks per day for one production shift. More typical might be 60 jph x 8 x 2 = 960 for two production shifts. Wide open throttle would be 60 x 10 x 2 = 1200 units for two 10 hour production shifts.

Similarly - at St Louis, you might have 45 jph x 8 = 360 trucks per day for one 8 hour shift; 45 x 8 x 2 = 720 per day for two 8 hour shifts; wide open would be 45 x 10 x 2 = 900 for two 10 hour shifts.

*scheduled overtime is just that: you know going in your are going to be working 9 hours, or 10 hours (ish). On the other hand, you might be scheduled to work 8 hours but, if you've had a particularly bad day due to repair or mechanical breakdowns, plant management might make the call to run a bit longer in order to recover some of that lost production. The production office would dictate the new hours (ie, 8.2, or 8.5 hours) and the new stop time would be communicated up and down the assembly line, both officially by phone but also more rapidly via the rumor mill.

And - it varies based on location within the assembly plant. So while final line might go 8.2 hours, body shop/paint might go 8.5 or 9 hours in order to fill all the buffers.

The goal is to always keep the final line running. Feeder lines and upstream activities can stop for a while as long as there is enough product in the buffers to keep the final line going. If the final line stops - that's when you are going to see some excitement.

Re: The build date project
 

Thanks a ton Keith, that is very valuable info for this project and gives us at least a rough idea of what we can likely expect. We’ve got enough in right now that we can get a really good estimate of some days or months, I hope to see that trend continue.

Re: The build date project
 

I have an update to the build info for my 1971 stepside SWB C10. I was shocked to find the very tattered build sheet still under the seat.

1Z622515. build sheet date of 01-21-71. :metal:

This truck was shipped to Santa Fe Motor Company at 418 Cerrillios Rd Santa Fe NM. It originally went into forest service use and then was transferred to a volunteer FD in a small NM town. I purchased the truck from the volunteer FD guy.

Re: The build date project
 

That's an awesome find! Congrats!

Re: The build date project
 

Done! Nice find!

Re: The build date project
 

70 chevy
0z155555
4/13/70

Re: The build date project
 

Hope this helps. side note: notice the engine I.D. tag 202 hanging off the exhaust bolt matches the build sheet.

Re: The build date project
 

I’ll get them added. I’ve got another I found in person to add as well.
Arctic man, that’s a pretty sweet find with the engine tag.

Re: The build date project
 

From BAT:

1970 CST/10 longbed Chevy.

CE140Z155555. with a build sheet date of 04/13/70

Re: The build date project
 

:mm:

Ahhhhhh, I only posted it because it wasn't in the first page list(s).

Re: The build date project
 

Sorry guys I’m a little behind. Been a busy few weeks. I will get them updated this weekend. I’ve got a few pmd updates that i will post up at the same time.

Re: The build date project
 

1967 gmc

ce2590dzc1502b

07-11-1967

Re: The build date project
 

72 chevy
08/71
2F307062

Re: The build date project
 

1970 Chevy C10 short bed found on classic.autotrader

Re: The build date project
 

71 K10 longed found on classic.autotrader. 1Z660587

Re: The build date project
 

Done. I’ve got some more I need to add from pms but I should have that done tomorrow. Carl, that last one from post 153 was added already on post 122. A for effort though! Keep em coming guys!

Re: The build date project
 

72 chevy

05/72
2S194130

Re: The build date project
 

This is the SPID from my 1972 GMC Sierra Grande. St. Louis built truck. As soon as I get the truck back in my possession I will look for the blue sticker with build month on it. I'm sure it's there, the truck is very original. S508014

Re: The build date project
 

Found on FB:
Early 1970 chevy
Attachment 2079604

Re: The build date project
 

deleted post........ :mm:

Re: The build date project
 

72 chevy Blazer
2F182202
6/72

Re: The build date project
 

72 chevy
2B115961
10/19/71