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

Killer6 said

Can You post a pic of the piston tops, particularly the cyl. that had the most rod brg. damage? If detonation was the cause, there should be pitting in the crowns to witness that,.... any?

Click to expand...

Sorry for the show response. I've been buried at work lately, it's hard to get in much shop time. Here are the two pistons that were in the worst shape. I don't see anything on the crowns but to me, they look like there's a lot of carbon buildup for just 700 miles.