Hey, replying to my own post, but in a good cause. Don't want anyone to waste time on a reply where none may be needed!

I've found what looks like the MAF-to-TBA connector, two screw clamps going around the MAF lower throat. The MAF data cable had been lying over the screws, and I wasn't able to see them until I got it out of the way.

I can also see one Allen head partially blocked by the MAF, which is probably part of the TBA to manifold connection.

Now all I have to do is to get these screw clamps off. Not a lot of room to work with in there! I have a couple of right-angle ratchet adapters that regularly save me, but I don't think they are going to fit in the space available. Maybe the tool store has a right-angle Phillips key that would do the job.

s/b