T0912CMJ

This is the number on the engine in a 1974 vette.

I am not sure it is the original engine. Anyone to tell me what engine it is ?

 

Christian

Check the pad on the front of the block just forward of the passenger side cylider head. It is a flat surface with numbers stamped in it. If it is the "original" engine the numbers will match the sequence number of the VIN.

LIKE Ranger3  said check the vin number and engine #

Check the pad on the front of the block just forward of the passenger side cylider head

1974 vins 1Z37J4S400001 through 1Z37J4S437502  If original engine the number will be some where between 400001 through 437502  

Big Al

apasbigal38674.6959722222

The letter codes are application codes and should be on the deck with the VIN. I checked those codes and couldn't find a vette match

Not a 'Vette engine, for sure.
Most likely a truck engine.

Christian,

my 79 doesn't have the original engine.  Engine code is K1010 CMJ (same code that you mention).  According to Mortec site, it can be a 350 ci (in early 70s) or a 305 ci.  I tend to think that the engine in my Vette is a rebuilt engine because I had a Firebird 75 with a 350 ci 4bbl in it (between 79 and 85), and I can confirm that my Vette engine is extremely responsive and nervous, delivering accelerations extremely better than those I got with my Firebird.

I made some research with Google on the code CMJ, and I remember that in a discussion group on a site about engines, someone wrote that some engines in Corvettes were having that three letter code (but I cannot confirm...)  Is it possible that some crate engines had this 3-letter code ?

Roger

The "T" in the stamp code would indicate a big block, I believe. The Tonawanda plant built the big block engines. Is this a big block(454)???

TO stands for the tonowanda plant

I believe Adam's Apple and RoadRacine are right.

I think this engine is a 1974 Camaro 350 engine rated at 160HP and installed in Police cars.

Christian

Here's results of my search, hope this helps you out.

T0912CMJ

T=towanda, 09=SEPT, 12=DAY OF WEEK, CMJ=see below

FY

RPO

CID

appl &n bsp;

VIN

HP

BBLS

Comments

1974	CMJ	350	t4OO police				4        full size
1980	CMJ	305	automatic trans.			H	full size/Camaro