?? Reference for 454 mag casting/serial #s
 

What is or where on the net can I find the best reference for 454 mag serial/casting numbers.

I have a block that has a serial number of O677613 (the first 6 could be a B) and a block casting number of 14615445 (the first 3 digits of the serial number are rusted and hard to read.

My heads have a casting number of 3994026.

I keep spinning my wheels wasting time trying to figure it out so I was hoping someone could point me in the right direction. I have some bad scoring/rust marks in a cylinder and am trying to figure this all out. Thanks!

OK - the crickets were out here so I kept looking. This site seems to work great for all casting numbers (I tried my block and head numbers and they worked). http://www.castingnumbers.info/site/search/15445