[bbbentley]

I have a block (bbc) that has had the lifter valley that appears to have been shot peened. I can only assume it was to aid in oil drain back? The texture is smoother than the rest of the cast surfaces. If it had not been for my penchant to test fit everything before assembly, I would not have caught that the peening had distorted the tops of each lifter hole preventing lifter installing. Deburring corrected this. But be aware that distortions are possible.
On another bb I have that was rusty, the shop put it in a blast cabinet with a caustic soda rinse. Now, you have to use a magnifying glass to read the pad. Guess the shop screwed that one up? So, be careful. I like the magnet idea On the pad mentioned