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

Wow! I spent the day in the shop working on this engine, and now the thread needs a ton of updating. I may have to break this into a couple of posts to keep things coherent.

As info, the question of hydraulic/solid cam has come up often. It is indeed an 82 block with an 82 hydraulic head. I didn't want a juice cam so I swapped in a full solid valve train from a 78 Volare with rocker arm and bolts, rockers, new lifters, and I think the original pushrods. The cam is a solid cam that was reground, it does NOT have the groove on the rear journal.

Bewy said

Comments about post #114.
- carbon; looks like oil getting into the chamber. Piston ring failure, worn v/guides &/or seals. Also most important: check the wear of the ring grooves, up/down, in the pistons. Worn grooves make excellent oil pumps....

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I will be checking the rings and grooves. These are new pistons and rings so only the problematic 700 miles on them.

RustyRatRod said

Just a question.....you know there are cast crank and forged crank engines, I am sure. Unlike the V8s, the slant 6 uses different bearings in each engine. Forged crank engines have their respective blocks, cranks and rods that are all different than that of a cast crank engine. They also use different bearings. Is it possible "any of that" got mixed up?

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Yes, I'm aware of the forged/cast crank business. I will double check this, but I'm pretty sure this is the first time this engine had been cracked open since it left Detroit.