From my research;
Saleen made 60 California Editions in 1989 and 40 in 1990. They were NOT full Saleens, but they did have the full Racecraft Suspension treatment w/ Monroe GP shocks and struts, 4 lug customized white American Racing mesh wheels, (assuming no brake upgrade) and General XP high performance tires. I don't believe the interiors were modded at all, meaning no Flofit seats or Momo steering wheel. I have also seen black as well as grey interiors. I *believe* that all had modified tailpipes, to stick out under the standard GT bumper cover, not 100% sure of that. I have also seen them with the standard "cheese grater" taillights and some with LX tails, but those could have been swapped, I guess. Of course they all came with the Saleen wing. These probably sold very well, falling in price range between the Ford top of the line GT and the full Saleen treatment (SC at the time). Weird that they were left out of Brad Bowling's book, as it is extremely comprehensive, otherwise.
I have no information about the GT Sport model, but I do know it was offered in 1992 only. The nationwide extension of the California edition makes sense. Anyone else?