OK, I decided I just couldn't stand it. Let the cleaning begin!
This is an interesting (to me anyway) pic. This is the underside of the lower intake manifold. On the right is after soaking in diluted Purple Power solution and pressure washing. The middle section is just pressure washing, and the left section is just after being soaked without a rinse.
Here's the injectors before sonic cleaning:
Here's a good indication of just how nasty this thing was leaking. It leaked oil from everywhere it could leak (hopefully not the heads since I don't intend to pull them) - even the lifter valley had oil seeping out of it.
I have finished with the front and rear seals, and I did one valve cover, but it's coming back off for paint. I can't do the oil pan until I get the new pan and pickup sump. I'm also waiting on the new gas tank and sender, so I have a few days to keep cleaning.