Deciphering numbers
Thread Starter
Racer
Joined: Jun 2006
Posts: 289
Likes: 40
From: Duxbury MA
Deciphering numbers
I need some help deciphering some numbers on my '66 427/425. I would like to be able to do it my self. Is there a book that explains and lists the serial numbers?
My car serial number is 194676S122390
I took the valve covers off and the drivers side had the follow codes on it:
3904391
A 237
GM3T
Passenger side:
3873858
B 176
GM2T
Any help is appreciated.
My car serial number is 194676S122390
I took the valve covers off and the drivers side had the follow codes on it:
3904391
A 237
GM3T
Passenger side:
3873858
B 176
GM2T
Any help is appreciated.
Safety Car
Joined: Sep 2006
Posts: 3,526
Likes: 138
I need some help deciphering some numbers on my '66 427/425. I would like to be able to do it my self. Is there a book that explains and lists the serial numbers?
My car serial number is 194676S122390
I took the valve covers off and the drivers side had the follow codes on it:
3904391
A 237
GM3T
Passenger side:
3873858
B 176
GM2T
Any help is appreciated.
My car serial number is 194676S122390
I took the valve covers off and the drivers side had the follow codes on it:
3904391
A 237
GM3T
Passenger side:
3873858
B 176
GM2T
Any help is appreciated.
858 head 1966 head production date Feb 17 1966
I'm not sure but I think the GM2T and 3T would be 2nd and 3rd shift. Someone correct me if I'm wrong.
Drifting
Joined: Jul 2010
Posts: 1,388
Likes: 502
From: Minnesota
2023 C1 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared))
2019 C1 of Year Finalist (track prepared)
Your car is a late '66. According to the C2 Registry it was built on or about May 23, 1966.
There are several books that list most of the numbers for your car. The Corvette Black Book is perhaps the best known, but my book of choice is my NCRS 1953-1972 Pocket Spec Guide that I bought in about 1990.
If you're checking numbers because you're curious about your car's originality, NCRS is a club to join (if you haven't already). If you are just checking the heads, or you're preparing to sell your car, most of the answers you would be looking for can be found for free here or elsewhere on line.
There are several books that list most of the numbers for your car. The Corvette Black Book is perhaps the best known, but my book of choice is my NCRS 1953-1972 Pocket Spec Guide that I bought in about 1990.
If you're checking numbers because you're curious about your car's originality, NCRS is a club to join (if you haven't already). If you are just checking the heads, or you're preparing to sell your car, most of the answers you would be looking for can be found for free here or elsewhere on line.
