January 1974 is when the memo was released about the trans. change , it was a rolling change. GM wasn't going to scrap a bunch of Muncies because of a memo exactly in January that day.....what they did is use them up till there gone. BTW I am the original owner of my car, its a 2B build and has the M20 MUNCIE trans and this is the same trans that is in the car today.
What is your stamped engine block code suffix ? CMS or CLJ ?
Thank you. Although my car VIN and engine block VIN match, so it doesn't reveal anything new. CLJ=350 mt (manual trans) z (z28). CMS would add "ce" for "California Emissions" (car wasn't sold new in California)
thank you , this answered my question I asked previously , I had inquired because I never seen anybody have a CLJ motor and a Warner 4 speed , just curious , I’ve been on here a long time and yours is the first I heard paired like that on this site.
"CLJ" appears to mean any 350 z28 4sp without California emissions in the 1974 model year, so I wouldn't think my car having a T10 would be much of a unicorn.
Curious where you found those numbers?
As a ‘74 owner myself I’ve been very interested in the trivia too. Another example is how many Camaros were built after April ‘74? Nasty numbers don’t go beyond that but from anything I’ve read the ‘74s may have been built into early September. Zfools car iirc was built in august.
