Good morning fellow small block engine enthusiasts! I am looking for information on a Chevy 350 that is currently in my 1987 Chevy Suburban. The block ID, on the front right of the block reads as follows: VB103268. There is NO suffix code at all. The left rear of the block has 5.7 LG SGI cast into it. I can not see the block casting number, it's just too crowded back there. There is a number 638 cast on the side of the block. I have searched for weeks and can not find an answer......any one out there know what this engine is??