'70 Chevelle SS396/4-sp, Interesting Protectoplate Error

**GotGrunt** · #1 12-24-2023, 06:49 PM

I’m pretty sure the TX is correct as I’ve seen others the same way. I’m not sure if there’s a reason behind why some got the 2 letter code vs 3, maybe related to build date? Hope someone more familiar with the 1970 POP can chime in.

**Big Block Bill** · #2 12-26-2023, 03:00 AM

Quote:

Originally Posted by GotGrunt

I’m pretty sure the TX is correct as I’ve seen others the same way. I’m not sure if there’s a reason behind why some got the 2 letter code vs 3, maybe related to build date? Hope someone more familiar with the 1970 POP can chime in.

I believe it has to do with the 402 CID verses 396 CID when they went from 2 digit code to 3 digit codes but with a January 3rd week build date that is very late from what I have seen with 2 digit codes in the past. Bill

**GotGrunt** · #3 12-26-2023, 03:46 AM

Quote:

Originally Posted by Big Block Bill

I believe it has to do with the 402 CID verses 396 CID when they went from 2 digit code to 3 digit codes but with a January 3rd week build date that is very late from what I have seen with 2 digit codes in the past. Bill

The 402 & 3 digit suffix codes started late in the 1969 model year.

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Big Block Bill (12-26-2023)

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