What motor do I have?

I have a small block in a '62 Nova. Not the original. Numbers are VT 207MS, 3814678, and 18W258495. Anyone know what this motor is? Thanks

3814678 is a part number for a 4barrel aluminum intake manifold for a 63-64 Chevy 409

http://cgi.ebay.com/ebaymotors/3814678-63-64-Chevy-409-400hp-Aluminum-Intake-678_W0QQitemZ220071846311QQihZ012QQcategoryZ36474QQcmdZViewItem

Google is your friend 

Hi, Try mortec.com or yearone.com tech pages.If you can't find it there send me the casting numbers from the positions shown at these web sites and I will try a couple membership required sites and/or my reference library.