Build Date Question

[doo142]

My Dana tc buid date 1-70 , terrible pic, it is written backwards in case so use some imagination.lol.

[IronCanine]

Originally Posted by doo142

My Dana tc buid date 1-70 , terrible pic, it is written backwards in case so use some imagination.lol.

Thanks for taking the pic and posting. The more info though, the bigger the puzzle it seems.

[IronCanine]

Ok... so just plugging in our newest info...if 155XXX was assembled in March but before the 11th

September 102XXX
October
November 122XXX
December 1389XX
January
February
March 155XXX, 157XXX

...and my truck was assembled after January 13th....

...and using Keith's logic and rough calculation from the Trucks side thread on this:

"I counted 45 working days between the period of September 15 and November 15, 1969 (not counting any overtime; I arbitrarily chose the middle of the month).

122,000 - 102,000 = 20,000, divided by the 45 days = 444 units per day.

As a sense check, 55.5 jobs per hour for an 8 hour day. That's a pretty good value as most of the truck plants ran, and still do run, around 60 jobs per hour. I do not know if St Louis was running one or two shifts of production at that time.

Now, even though that rate doesn't seem to hold true for the period from December 15 to March 15, I would propose we can build up from the December value of 138,900 at a rate of 444 units per day.

145,100 - 138,900 = 13 days, which would likely put the build in the mid January 1970 timeframe, assuming (again) no overtime and that the plant did not run during the time between Christmas and the New Year holiday.

Looking at it another way, 145,100 is about 1/3 of the way between 138,900 and 157,000. I count roughly 66 working days between those two values, so we could figure your truck was built approximately 22 days after 138,900. Assuming 138,900 was built on December 15 (arbitrarily) then I count 22 working days up to January 26, 1970, again assuming no overtime and that the plant did not run between Christmas and New Year." --Keith Seymore

....Everything still works for it to be a late January truck, but gosh I wish we could get a February VIN or five.

Thanks again for all the help guys. Please continue to keep your eyes peeled for 70 St.L's.

[doo142]

Too cool! When I first seen this I thought that's an uphill battle ( to put it nicely) but look at it now!! Takes a village!

[vancelot69]

Originally Posted by Keith Seymore

Sure there are.

Looks like around 40,000 or so (just considering the ones from St Louis); three of which are represented in this thread.

Why were you wondering?

K

I was curious because I was born in '69, and always wanted a '69 Blazer, but when I discovered that the Jimmy's had quad headlights, I decided I liked that better, but they only go back to 1970, so I thought it would be cool if I had '70 Jimmy with a '69 build year.

Edit: Sorry for hijacking the thread.

[doo142]

Originally Posted by doo142

70 blazer St. Louis built,
POP build month is 3
Scheduled ship is 3/11/70
Delivery to cust. 6/16/70
Circuit board 11/17/69
Guages 3/6/70
Vin ke1805155878
Build seq. #385
I ruined door tag before I knew better
Trans. Case date 1/70

Tight time frame on motor, cast on 3/3/70,
Built on 3/5/70
Truck shipped 3/11/70
Must have still been cooling when they built it !! Lol

[IronCanine]

TTT....looking for fresh eyes with ties to 70 StL Chevys.

[IronCanine]

Tx3.

[hemi43]

Here's the info on my Blazer;

[IronCanine]

Originally Posted by hemi43

Here's the info on my Blazer;

Thanks...she's a May baby...a May-be.

[IronCanine]

Numbers update:

September 102XXX
October
November 122XXX
December 1389XX
January
February
March 155XXX, 157XXX
April
May 167XXX

Still on the hunt for some January and February numbers...

[60case]

I bought a 1970 blazer in February and just started working on it and the serial number is 26 before the one in your first post. So I guess my build date should be 9/69 Thanks for the info on build dates.

[Chulisohombre]

If it's still the stock gears in the rear end, The build date is stamped on the ring gear. Since its a corporate 12 bolt it was built in the gm plant. Don't know how close to the truck build date the axles were built though.

[IronCanine]

Originally Posted by Chulisohombre

If it's still the stock gears in the rear end, The build date is stamped on the ring gear. Since its a corporate 12 bolt it was built in the gm plant. Don't know how close to the truck build date the axles were built though.

Rear axle was stamped January 7th...right in line with the other stuff on the truck. Sorry, I had already posted that on the trucks' side version of this thread...should have included that info here already too.

[Chulisohombre]

Ok. Still looks like you're pushing late January then.

[IronCanine]

Originally Posted by Chulisohombre

Ok. Still looks like you're pushing late January then.

Yes...it's a tough one. I really think it was at the end of January, but it's going to be hard to confirm unless somebody hits us with some really close numbers. I need a lower number in February or a higher number in January...that's not too much to ask right

[Chulisohombre]

45 years is a long time to still have that info. Mine was dragged thru hell and back before I saved it. Too bad the protectoplate is long gone. Or any other way to tell. I thought the frame was stamped with a vin and build date on the top rail below the drivers seat. Don't quote me on that but I think I've seen one.

[SS Tim]

Originally Posted by IronCanine

I PM'd Zach, who posted the 148607 SPID on the truck thread that you referenced Tim. Hopefully he'll be able to tell us when it was built.

Was there ever a follow up on the VIN ..148607 posted in #15 & 7? Were you ever able to establish who originally posted it and where (link?)?

[IronCanine]

Originally Posted by SS Tim

Was there ever a follow up on the VIN ..148607 posted in #15 & 7? Were you ever able to establish who originally posted it and where (link?)?

Door sticker had been painted over. He didn't feel like he could get to the build date.

[SS Tim]

Originally Posted by IronCanine

Door sticker had been painted over. He didn't feel like he could get to the build date.

Understand.... might be worth looking into his engine assembly code. Of if he happens to have the POP. Either would give a good data point, in fact a POP will have both the engine assembly date and the build month on it. Being about 3500 units higher gets us to around 10 days later than your truck.

[smbrouss70]

IronCanine, looking at this Craigslist add for a 2wd Blazer, I've noticed that it must be an early 1970 because it is the only other one that I've seen with the "8-350" badge under the K-5 emblem. In one of the pictures you can see that it does still have the Manufacture date sticker on the driver's door. It might be worth trying to contact the guy and see if the info is close enough to help you on your quest to find your manufacture date.

http://sandiego.craigslist.org/nsd/cto/4969515558.html

[IronCanine]

Originally Posted by smbrouss70

IronCanine, looking at this Craigslist add for a 2wd Blazer, I've noticed that it must be an early 1970 because it is the only other one that I've seen with the "8-350" badge under the K-5 emblem. In one of the pictures you can see that it does still have the Manufacture date sticker on the driver's door. It might be worth trying to contact the guy and see if the info is close enough to help you on your quest to find your manufacture date.

http://sandiego.craigslist.org/nsd/cto/4969515558.html

Thanks for the heads up...I called him and it's a S151XXX...very close. He's going to text me the date tomorrow (hopefully). Seemed nice. Sounded and looked like a legit one owner. Gonna make someone very happy. Helluva truck. Hope you posted it in the 2wd find thread.

[smbrouss70]

I found it in the 2wd find thread. Wow, 6,000 units away from yours, if it is a late January build date, that pretty much settles it for you, huh?

[IronCanine]

Originally Posted by smbrouss70

I found it in the 2wd find thread. Wow, 6,000 units away from yours, if it is a late January build date, that pretty much settles it for you, huh?

Exactly...that would be awesome. But I would be pretty surprised if it wasn't February. It will narrow the search field regardless. Thanks for the heads up.

[JimH2828]

IronCanine, my 70 Blazer is from St. Louis too. VIN is KE180S1432xx and my door tag says "1/70".