small block chev guys, identification please!

just wondering what kind of motor I'm putting in my 40. Bought it today and can't find a place to look up the numbers. anyone know what this is and if there is a good site for identifying em...thanks
stamped # is FO3T4OD I'm pretty sure, hard to read

 

http://www.mortec.com

Check these guy's out. You need the casting numbers on the drivers rear of the block to check against their numbers..
That should tell you what it is.

Rat..

 

I find FC which is a 69 327 with 350 ******

 

Bring this question to www.chevytalk.com
They'll tell you more than you ever hoped to know.

 

I guess I havre to take a closer look tomorrow.thanks...