I don't need the vents, but someone might. The weatherstrip seal for the decklid could be installed on the Formula. Every time I start it, I have to watch for smoke from smoldering leaves on the manifold.
That's an Isuzu 5-speed transmission. It used the same slave cylinder as the 85 and 86 Muncie. The 84 Muncie had an entirely different slave that was used by no other Fiero. You said you got the cables from it, but the cable to transmission mount would be a worthwhile grab, also. You can pop in an 85 Toyota MR2 rebuild kit into the slave and you've got the double seal slave. Cost about $7.00.