There were several threads of attempted ecotec swaps over on the forum I posted, but I never saw one get completed. I’ve been out of the Fiero game for a while though so you should definitely do a little digging at Pennocks.
As for the SHO… :lol:
Good luck replacing all the electronics in the car. All the engines I listed you can splice a harness together or buy one pre-made. If you’re going to swap stick to GM motors. You have plenty of options.