The thing is, there is no suffix number there. It's completely blank. There's not even the partial of one left, which completely puzzles me.hello 70novafan, the #'s you are trying to i.d. are the assembly# & partial vin#. On the 1st #: 1=chevy,2=model year,L= production plant, 516959=I believe is the car prodution#. The 2nd# is your engines assembly date & suffix#. T= Tonawanda plant, 09=september,30=30th day. The suffix# would follow the T0930 & from the year shown it would probably be a 3 letter suffix I think. The suffix defines what vehicle. Such as truck or car,stick or automatic,etc.. Your casting #s are on the back, top of the engine where the bellhousing bolts to the engine. There will be a casting date & block casting #. Hope this helps.
I'm thinking you're right in the fact that there used to be letters there. I scrubbed as hard and as much as I could with a wire brush but nothing. Is there any other way to identify the size and origin of the engine? I was told it was a 350, but ya never know I guess.I think there's more letters under the alternator... at least there used to be.
CKY=if a 72 block its a LT1 corvette block, 4speed,4bblAlright.. Sprayed my brush with some carb cleaner and after about half an hours worth of scrubbing I think I see some like "CK1" at the end. I'd take a picture but I guarantee it wouldn't show up in it.
EDIT: Could be "CKY" I can only see the base of the last digit.
Im guessing the date code isn't easily visible while the engine is in the car? Sorry for all the questions.CKY=if a 72 block its a LT1 corvette block, 4speed,4bbl
CFT=if a 72 block is LT1 z28 camaro th350
These depend upon the date code,post the date code to narrow it down to the year. Date code found on back as in above picture.
Not that hard to see if it clean, they are raised not stamped.
Can try a little mirror to look down there?
Thanks a lot. Ill have to look down there when I get back from work. It'll be 4 hours then Ill be back with whatever I find.Nice engine you have as I have a CTB in my 70.