need help! what motor is this?

[Got_my_air_on]

trying to buy this motor from a guy for a good deal I just need help identifying it.

Numbers on the block are: #T0204CTK #12R536598 #OONV2

Thats all it says

Its a chevy and he says 350 but not sure

[dk1989]

I have no clue what those numbers make it to be, good luck

[Got_my_air_on]

Its an older man, so maybe hes reading them wrong?

[Drace1963]

http://www.mortec.com/castnum.htm

[Got_my_air_on]

I got it, he was reading the wrong numbers. Its a 307