No. You're thinking of the 5.0's, which went mass air in california a year before they did everywhere else. 2.3's didn't have mass air until they went to the dual plug engine, and that was in 1991.
That's what I thought too, but then I found a red notch at the junkyard that has black trim (not body color, i.e. pre-'91), single plug (distributor), and MAF. 'Splain that one.
OK, the thing is that my car's a 1990 LX convertible and it has a MAF... I bought it 4 years ago and up until now I came up with this question, LOL! I'll take a pic to prove it.