I have a 1966 Corvette and need help to identify the Engine numbers

I have a 1966 corvette with a motor i believe to be a 350 here are the numbers off rear of the block 3970010.The numbers on the front of the block passenger side are c6u1080 and right next to those numbers are vo910tyu any help with these particular numbers woud be of great help.were it was made ,year it was made  what type of car was it out of.Thanks  

Block #3970010 is 350 for Corvette, but 1969.  Also used in Camaro, Chevy ll, Chevelle, and Passenger cars.  Horsepower from 255 -350.  1966 didnot have a 350 block not till 1969.  1966 did have a 327 / 350 hp, the # for that is - there is two - 3858174. and 3892657  lp, (uu) - late production, and uncertain usage.   That is in one book.   Another book says 1966 Corvette 327 , #3858174, and #3858180.  The third book agrees with both  books. #3892657 was used in 1966 &1967 , as a 327.  Hope this helps  

Thanks for the help .I know its not for my year trying to find out about the other numbers that were stamped on front passenger side on flat plate in front of head also to see what it came out of and maybe to find out horsepower and if 4 bolt or 2.Thanks again for taking time out.  

dells66 Welcome to CHP.

The P/N 3970010 reprsents a large joutnal 4" bore block. It can be a 2 or 4 glock block. You will have to pull the pan to determine that. That is all that number represents, nothing more..

Nob  

oh.. by the way.. not to deflate you.. but the block id number stamped into the front of the deck surface on the right side.. TYU decodes to ..

1975        TYU        350        van & bus        vin L    RPO LS9        165HP        4 bbl        C-20 to 3500


these are almost always 4 bolt main blocks.. many had forged cranks.. usually OE applications with manual transmissions..  but who knows what's inside your engine..

some of those motors had head casting numbers like xxxx173..   or something like that.. the springs and keepers are the same.. but the exhaust valve stems are 3/8" instead of the normal 11/32" this is because the larger valve stem allowed sodium to be used in the hollow valve stems.. the sodium melted and bounced up and down.. transferring heat from the valve head to the guide where the heat could be radiated to the coolant around the guides in the head.  this was because the original motor was designed to last pulling heavy loads for hours on end..
the sodium exhaust valve heads also had smaller than 1,94" intakes    i don't recall.. 1.84 or 1.72".. to limit high speed operation..


but you could have any number of heads on this motor..  

Thanks for the info very well appreciated.The motor seems to have a lot of power the previous owner must have did some kind of work to this motor.  

Thanks for the info.  

dells66

Here is the rest of the engine code.
C6U1080

V0910TYU

V= Flint (Engine)

09= 9th month

10= 10th day of that month

1975= 350
Van/bus
LS9= the RPO
165 Horse Power
4BBL. Carb.
C-20 to 3500 Application