ID: 3970014, date code looks to be 1-19-74. numbers say either a 74 truck motor, or a 70-73 LA built camaro....ive had conflicting answers, but this site says camaro 350/300hp:
http://www.nastyz28.com/sbchevy/sblock.php
350, 2 bolt. completely bare, had it checked out by halden auto parts. magnaflux check was good. was stock bore, it will need to be bored over as from wear and tear the bore is slightly oversized for stock pistons.
$50 located in 07057