Hey sunbird, there'* a reason that most Fieros don't swap a S2 into their cars. And I saw a Grand Am with a swap, and I'm amazed he got around the problem.
The nosedrive and belt path on the S2 is much farther off-axis than the S1, and in fact, that SC drive belt has to travel around an engine mount in the larger cars to get it to work. That'* going to be quite a trick in a Sunbird engine compartment.
It'* possible, but you won't have anything you can work on in the future. A S1 swap will be much more practical, especially in a dinky car like you have. MUCH more practical.
And if you consider an intercooled setup, you can ditch the hood.