Mike, it's a mixed year and it's quite possible you have an evo1 with 91+ intermediate shaft. If the center diff in the middle in the above pic is the one that came out of the evo1 trans then it looks like 91+ as I can see a notch in the teeth. Take a closer pic of the center diff and intermediate shaft out of the evo1 trans and I can confirm.

FWIW I have an evo1 gearset sitting in my garage right now and it is all 90 style.

Also, you got steel forks there in the evo1 trans which you would want to use, and in case you did not know it also has the tall 5th gear, same ratio as the evo3 5th.