1970, Small Block, VIN number falls between end of May (410552) and end of June (413829).
Here are a few codes I have deciphered correctly ( I hope ) and would like to know if you think they are in logical, correct order in regards to the C3 building process ?

Tank Sticker(Corvette Order Copy)/Date received is 70/04/08
Casting date on top of Bell Housing...May 20, 1970
Engine assembly date...May 26, 1970
Trim Tag Build date...June 10
Carb Date Code...1970/February/3rd week.

I know building Corvettes wasn't a perfect science, but my guess is, there was some consistency ? Any discrepencies in the above dates, point em out.

I appreciate the feedback. The forum looks like a great place for me to learn some things, and laugh too! Thanks in advance.

 

Looks good to me. Here are some numbers for comparison on a June build 70 that I use to own.

Tank Sticker(Corvette Order Copy)/Date received is 70/06/11
Casting date on top of Bell Housing...May 15, 1970
Engine assembly date...June 6, 1970
Trim Tag Build date...June 27
Carb Date Code...replacement carb

Hope this helps.

 

Need to post this question on the NCRS site. They will tell ya

 

NCRS allows 6 months between casting date, engine assembly date, and vehicle build date. This is the exception. It should normally be closer to 2 to 8 weeks. Carb should be no more than 6 months also, but again 6 months is the exception. I don't think that the order date from tank sticker is judged by NCRS.

 

Stanton is correct about NCRS not judging the tank sticker or Corvette Order Copy "date received"...most do not have them and the 6 month rule is the general guideline. Actually the Apr 8th date to the Jun 10th date is unusally long but there were hold ups in production then as there are "constraints" today.

NCRS generally starts with the trim tag date and works back...your dates fall into patterns that are not unusual and fit the 6 month rule. To take your documentation to the next level, confirm your transmission VIN matches that on the block. Your engine block casting date also precedes the engine assembly date by six days...which is to be expected. Also use your tank sticker and reconcile RPOs on the sticker with what's on the car...like a 336 rear axle ratio should show the correct code on the differential housing that documents a 336 rear end in the car.

Remember, the trim tag went on once the body was together and painted but before it entered the trim line. At this point, the chassis had begun assembly on the other side of the plant. But there was no science to picking parts with "correct date codes" or any of that nonsense. This was production...they pulled parts out of big bins and slapped them in place, confirming the broadcast code on the part with that on the build sheet when a non-base option was specified.

You've done some nice work here...I would suggest if this date code stuff has really piqued your interest, go to the NCRS.org site and order a copy of the 1970-72 technical reference manual. It will itemize all date codes, how to find and interpret them. Than with that list along with your tank sticker...you'll have some nice documentation for your 1970.

 

Hunt4cleanair, THANKS for the helpful info. That is what I was looking for, just some general knowledge that the car is in somewhat of a normal order/pattern. I am new to this, and I'm not interested in being judged at an NCRS meet at the present time. I do like #'s matching cars, but I'm not freaked out by the numbers game,etc. I'm also into driving the car, if you know what I mean.....
I'm not into building a perfect, show car. Just wanted to know if the car is legit, and things are not shady, just basic numbers stuff. I don't even know where most of the date codes are at this point. I do know the tranny VIN is the same as the block. I do already own the 70-72 book you spoke of. I'm learning my way around the car (and this site) and I appreciate the help.
Thanks again.

 

Thanks also to Stanton for your input and scoop on your old 70 car.
I guess this isn't the "numbers' place, and that's cool. As stated before, just trying to figure things out on a C3. It's part of the fun for me, but I won't be worrying about if I have the correct screws and fasteners.....nice to know about large items though, engine, tranny, carb, etc.
I was hoping to get a little more feedback on this issue, but a few posts can set ya straight !
I didn't even know if the trim tag date should be before or after engine assembly, that's how ignorant I am about the #'s right now.
I can only handle so many discussion forums, and by lurking for awhile, I saw you guys having fun and thought it was time to jump in and ask some questions.