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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Joemt on February 08, 2016, 08:59:27 pm

Title: 1982 gmc 3/4 ton 4x4 with older 350 engine. Help with engine block date code
Post by: Joemt on February 08, 2016, 08:59:27 pm

We have looked and can't quite nail down the year for certain. Numbers we have:

T0209CMJ = 1974 CMJ  350  t4OO police  -  4  full size   or  1980 CMJ  305  automatic trans. H  -  -  full size/Camaro
3970014      = 1970 - 76   350

A15 76   IS this the date code?  If so is it saying 76 and how does that fit the 74 police spec?

Title: Re: 1982 gmc 3/4 ton 4x4 with older 350 engine. Help with engine block date code
Post by: jg1977c20 on February 11, 2016, 02:44:41 am

this is the correct info          T0209CMJ = 1974 CMJ  350  t4OO police  -  4  full size

to elaborate more it was built at the Tonawanda Plant  FEB 9th ( CMJ ) indicates it is a t400 used installed for police and it will be a 4bolt main

the vin#3970014 indicates the block only was used from 1968 - 1979