all this was on my engine

T1028CTW 10L150875

Also what is the assembly plant BL (cowltag) or L (vin)

Has anyone ever decoded a frame number?
heres mine if you can..
3960733 S 275
11 18 S 2 XU


Thanks,
Dan

Originally posted by bluechevelless:
all this was on my engine

T1028CTW 10L150875

Also what is the assembly plant BL (cowltag) or L (vin)

Has anyone ever decoded a frame number?
heres mine if you can..
3960733 S 275
11 18 S 2 XU

Thanks,
Dan T1028CTW ~ Tonawanda, Oct 28, 402/350hp (L34) w/TH400 trans
10L150875 - Chevrolet, 1970, Van Nuys (Los Angeles), last 6 digits of VIN of car engine came in.

3960733 ~ part number
S ~ mfg by A.O. Smith
275 ~ October 2 (I think - 275 day of the year it was manufactured)
11 18 S 2 XU ~ suppose to decode to day/month/year/shift but the "S" doesn't seem to fit...XU is the code for the build sheet assembly of a Sport Coupe.

Not uncommon for body plate and VIN plate to have different letters for assembly plants. Both L and BL are for Van Nuys/Los Angeles. VIN plates always have a single letter while body plates can have up to three characters such as B and BAL for Baltimore, G and FRA for Framingham, or Z and BF for Fremont.

Originally posted by Dale McIntosh:

3960733 ~ part number
S ~ mfg by A.O. Smith
275 ~ October 2 (I think - 275 day of the year it was manufactured)
11 18 S 2 XU ~ suppose to decode to day/month/year/shift but the "S" doesn't seem to fit...XU is the code for the build sheet assembly of a Sport Coupe.The "S" had a circle around it so I didnt know to include it or not so I just put it in there.

yes, the circle is part of the AO Smith trademark.

Since you guys can tell me the frame can you guys tell me these?
**Head (passengers side)
-1267-GM4T-3917215-CONV4

**Head (drivers side)
-J107-GM3T-3917215-CONV4

**Tranny
10L150875
8623462-1

**Rear End
KDC1251
0221

**Power Steering Gear Box
5691676

**Water Pump
12554747

**Distributer
1103274
7H05

And can you tell me what they are from?
thanks for the Help!
Dan

Dale, do you know any of these?

I am sure Dale will be back to help.

I also have another question, How can I tell if my 1970 model car was built in 1969 or 1970? Did they still have the 1970 model in December of 1970?

Ok ive gotten the Rear end and tranny so I still need help with these...

**Head (passengers side)
-1267-GM4T-3917215-CONV4

**Head (drivers side)
-J107-GM3T-3917215-CONV4

**Power Steering Gear Box
5691676

**Water Pump
12554747

**Distributer
1103274
7H05

I cannot find the dist but the date is either 67 or 77 Aug 05.
On the heads I think that 1 is an I. I = Sept, 265th day J = Oct 107th day. I think this correct. I cannot find the other things.

3917215 1966 - 69 396
427 325 hp, 350 hp
335 hp, 385 hp, 390 hp, 400hp closed chamber

How can I tell if my 1970 model car was built in 1969 or 1970?
By the VIN sequence, the first car was 100001 at all plants and LA built aprrox, 15,000 per month.

Did they still have the 1970 model in December of 1970? No, production ended in July of 1970

Typical production year for 1970 was early Aug 69 to late July 70

Thanks for all your help.
So now all I need is the

**Power Steering Gear Box
5691676
Did they ever put this Gear box in the Chevelle?

**Water Pump
12554747
Would there be a date code on the water pump?

Ok, I just sandblasted my P/S gear box and found more numbers.
These are what I found.
5691676-9
310 (this is found close to the first numbers)

516--9 (found on top cover, little square pad, these were stamped)