Can you do your own fabrication? If you have a welder, an F body pedal setup, the original b body pedal bracket and can get a clutch pedal from an S10, you can save the cost of the F2B.
I made my own about 6 years ago and it's worked flawlessly for me in my daily driver ever since. The pedals sit level with each other and there is no hole in the firewall as the clutch master cylinder stays inside the car.
The bottom of the S10 pedal has a nice curve forward that makes space for your toe when you press in the clutch. If you just use the F body pedal your foot hits the pedal bar above the pedal pad unless you have very small feet and/or press in the pedal with the tips of your toes.