Quote:
Originally Posted by 71CHEVYSHORTBED402
Good stuff. Hey man, if you're starting to track sequence number I got one for you, it's 24419  Kidding, my build sheet only shows five digits, should be six, they missed the first digit. Serial # is 654xxx
From here, I don't think there's enough solid data to add value for tracking sequence number, especially since in at least one case, only 5 of 6 digits are shown. Hmm, might shed some light similar approx. build months per available data, not sure.
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I should add, seems the missing first digit is 6. If so that's 30K short of the serial number.
Interesting to note you have a duplicate under 1971 Freemont, which is my truck

I tried to be sneaky and gave you a serial number within 100 . I don't know how you found my build sheet without part of the serial redacted. The unredacted sheet is on post 435. I must have shared it someplace. I'll try to get over my paranoia.
So you can delete the record that reads "1Z654520 = 05/19/71 *serial number is within 10". Or vise versa, whatever you like.
I had to re-write some of this, my understanding of was messed up:
For "real life" comparison, the records show another Freemont truck built on 5/19/71, post 352. Both build sheets show 24 as the Job Sequence Number, next to the build date, I don't know what that means in practical terms. Looks like it was common for them to drop a digit from the sequence. That or the logic is a mystery to me short what's described above. Note the lag in sequence numbers as compared to the serial numbers, a difference of 20.
The K truck is a SWB Chevy, seems that's irregular, I don't suppose many of those were built? My C10 was special ordered with leaf springs on a SWB 2WD, pretty rare frame and combo. Perhaps they were grouped together somehow, because both builds were uncommon.
Here are the differences between the two trucks. On a side, coincidentally, 5/19/1971 is the date on coolant decals for what's supposed to be for 1971 & 72 trucks. Thus, most 1971 trucks including these would have had the previous decal.
Great job adding page numbers, as demonstrated by this.