I bought a 88 chevy stepside silverado a few months ago and it has a crate motor in it. I've looked for stampings on the passenger side of the motor to see if it is a 350 and all I can find is a bar code sticker with some numberes on it. Anyone have an idea where to look to see what the numbers mean? Why would some manufacturer use a bar code label instead of punching them on the cyl. head boss?