Understandable...sorta. Terms may be a bit mixed up tho...the 91 is a high port so is the 92 and the 93. So Im guessing it was a late 93 with the LOW port(throttle body up high). Ive been in both, and cant say there was much of a difference in the 93 and the 94(high vs. low port). The 91's feel hella rough compared to the 93's tho, my car is rough but nothing like some of the 91's Ive been in. Until late 93 there was no change to the car mechanicly. Only difference in 93 was a lower front spoiler, painted rocker panals, cruise option(started in 92), auto was an option for the first time, and change in interior cloth. But interesting that your 93 had a low port(Assumingly) I havent seen many of those. They started putting the low ports in I would guess around sept or so considering how far in advance they retool for the next year. I would guess that hey changed to the low port that early for tests, considering that the 94 was totaly identical to the 93's. They knew they had to change to the b14 in a year or two to meet the air bag laws and emmisions. Since they dont like just throwing an untested redsign of an engine in a car they were testing the low port.