That's the wrong side of the converter to tell for sure. There's a code plate on the dside of the tranny - Check yours and see if it's a P code. The lockup should have an R in the same place. I think I have the letter codes right, but in any case, the new tranny should have a letter code later alphabeticly to be a lockup.

The change apparently was a running change in the 89 model year. Never seen an 88 with one, all 90's seem to have one, and afaik, most 89's had one.

It's worth getting. You'll have to swap your 4cyl bellhousing onto the new tranny to fit the 2.6. You'll use the 2.6 flexplate, IIRC. Get all those spacer thingys on his flexplate, though.