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| | | Forums66 Topics128,076 Posts1,055,922 Members48,430 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Aug 2012 Posts: 10 New Guy | | New Guy Joined: Aug 2012 Posts: 10 | Hi Folks, It's been awhile since i was Active here, the reason is mainly due to that my Gmc 270 runs really great, so i have been out driving =)
However, i have picked up a mystery Chevy L6 for almost free, which i would like to ask you kind gentlemen if you might help me identifying what it is.
I Think i know so much that it is either a 194, 230 or 250. I know it is newer than 1963(?) since it has the "standard" Chevy bellhousing (a th350 would fit bolt-on without trans adapter) It also has a spin-on oil filter in front of the fuelpump.
The numbers i have been able to see are: Casting: 348675 (found on rear passenger side block, under this number is GM and under that is "2") Serial: F0507CGT (OR CCT) <- i have been able to work out that it might mean: Flint, May, 07.. but the CGT is a mystery to me.
Also, when comparing the width of the block to my gmc 270, it seems really narrow..kinda skinny, especially the valve cover (which is fastened with 6 bolts btw..)
When googling 348675 i see that some say it's a 69-78 Chevy 250, it would be great if this was the case, for then i am swapping the sbc350 in my hot rod for this one.
Thank you in advance for your thoughts about this.
/ Fred | | | | | Joined: Aug 2012 Posts: 566 Shop Shark | | Shop Shark Joined: Aug 2012 Posts: 566 | 348675 according to the Chevy Inline 6 Engines 1929-1989 book is a 1973-79 250 CID 100,105 Horsepower 7 Main Caps car motor.
CCT = 1975 Nova, 250 CID, 105 HP, 350 Transmission, L-22 RPO (Regular Production Option), 1 bbl., & Federal Smog equipment.
I did not see a code for CGT
Last edited by Tiny_Jaime; 09/18/2014 10:35 AM. Reason: added information
"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my sweet ride." -Amen 56 Chevy 3100 | | | | | Joined: Aug 2012 Posts: 10 New Guy | | New Guy Joined: Aug 2012 Posts: 10 | Thank you!
This makes sense, so what i have is a 1975 Chev 250, cast in Flint on the 7th of may. | | |
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