Thank you for the help and information. I'm gonna say this one has had a little work done to it then cause it's a little spunky and will spin all four 33" tires so maybe I'll start checking the numbers on the internal parts. Thank you again and sorry I had to ask but I tried searching and couldn't find the info anywhere.
Decode engine block 3970010 !
- Thread starter fredrik.löö[email protected]
- Start date
Mitch_Z
Member
The code is more likely cnn, that would be a 350 with automatic that went into a 1970 camaro, chevelle, nova or El camino.
Ok thanks I'm guessing that would be a 4 bolt main?
CNN code was for the L65 350 2 bbl engine so most likely it will be a 2 bolt main engine. Usually 4 bolt mains were used only on higher performance 4bbl engines.
But, you will never know until you pull the oil pan and take a look.
But, you will never know until you pull the oil pan and take a look.
Ok thanks
Yeah this is in my 68 camaro, it has double hump heads. I'm guessing those wouldn't be original, someone probably put those on it
sandlapper
Veteran Member
It's likely '68 did come OE with double camel hump heads --- as well as '69 & '70. Year '71 began low-compression era sbc with Large combustion chambers.
Pull a valve cover and find the raised Casting Number and raised Casting Date codes --- that'll usually tell the tale. Note: some have little valves, while others' valves are larger.
Blocks are similar --- in addition to pad stamp --- raised casting numbers and date codes.
JMO, the sense of 4-bolt mains' importance is exaggerated. YMMV.
Pull a valve cover and find the raised Casting Number and raised Casting Date codes --- that'll usually tell the tale. Note: some have little valves, while others' valves are larger.
Blocks are similar --- in addition to pad stamp --- raised casting numbers and date codes.
JMO, the sense of 4-bolt mains' importance is exaggerated. YMMV.
Last edited:
Ok thanks. I'm not sure that the motor is original none of the numbers match.
