need help identifying a chevy small block

it has hei and a casting number
355909

I called the deallership and they said that
I would need to go to the library.

basicaly is it a 305 or a 350 4 or 2 bolt?

please help.
does some one know of a web site whith this
info?

It could be a 2 bolt 1975 262ci. Or more likely a 76-79 305 2 bolt main. Info gathered at www.mortec.com pretty good site with few errors in data

look here http://www.nastyz28.com/sbcmenu.html it has alot of info.

I use both the sites listed above and this one:http://www.ammotorsports.com/chvheads.htm