Ideas on what's causing my click/tick/rattle noise?

Killer6 said
The lower image blurs when I try to blow it up, but it looks pretty rough...

I have better photos, below. They are in order from 1-6. Visually they do look rough, but by touch they are smooth. Just ugly looking.

my68barracuda said
I would have your machinest or someone with a lot of engine experience look at those pistons before re using them.
Let them know the engine ate rod bearings due to detonation.

Thanks - the machine shop guys are the ones that pointed to detonation, and they did inspect the rods and pistons saying they were OK to run.

In my mind, these pistons look pretty crusty with lots of carbon on them for only 700 miles on them. I'll get them cleaned up before they go back in the block.