I talked to the man.
He said $2,800.
[I said ouch.]
I didn't commit that day, I needed alternate wheels first.
Today I found the time to do a compression check. All six cylinders were exactly where they should be. Toward the high end of the expected range and all within 10 lbs of each other. [The manual allows for 30.] The plugs were the right color, there was no evidence of burnt oil, and the indicated pressure on the guage is right on as well..
That means that I don't need a full swap.
It also means that I have to go back to the manual and try to figure out what I do need.
I have already replaced the PCV valve and it's lines, so that shouldn't be it either.