Well, I finally went ahead and did it. The '93 covers fit over my FMS 1.6 rockers without any grinding or modifications (including leaving the baffle in place) using the FelPro 1645 gaskets (5/16" thick), and look *MUCH* better than the stock stamped-steel ones.
The oil fill tube cleared the IAC and TB without issue.
The stock oil filler cap fits with the Vortech intake setup, though it may not have done so with the stock intake tract.
My one-way breather cleared, too!
Except for this....
I was so pleased that everything cleared the intake tract that I never even thought to check the STB.
Had I done so, I would have cut the filler tube, and extended it using part of a 90° silicone elbow as I've seen mentioned. This would have been a helluvalot easier to do with the VC *off* the car, but may be possible with it in place by moving a few things like fuel lines and heater hose out of the way, and using a Dremel cutoff wheel and shop vac for particulate capture.
In the meantime, this is my solution. It will make filling the oil a PITA, but will suffice for now.
I had to grind the EGR flange on the intake to clear the taller Fox cover (I had only a few sheets of paper's clearance over the stock ones).
Even with all that material removed, I still ended up doubling up the upper intake gaskets to eek out enough space. Word to the wise to those with a TFS intake setup: Buy the Trickflow-branded gaskets, *NOT* the BBK ones. The BBK gaskets had about 1/8" overhang into the intake ports in some areas, and extended out past the intake manifold flange (which looked like crap). The excess material seen below was removed with a dremel and sanding drum. Never again.
All in all, though, I'm very glad I did it, and only wish I'd done so sooner!
The driver's side cover gets a little buried...
... but the passenger cover shows itself off pretty well.