Something let go in my current motor last Sunday at the track. A friend of mine has a 350 out of an 84 suburban, and he gave it to me just to get it out of his shop. I have the numbers from the front of the block passenger side head.

VO522FRC (NOT SURE IF IT'S 'VO', or 'V0')
CEF177770

If someone could decode this I would greatly appreciate it.

Thanks