Regarding brake pedal going "deep". I owned a Pontiac Fiero for 27 years and only sold it as there was no room in the garage after I bought the Crossfire 3 years ago. I thought that my clutch pedal was also going too deep and eventually it got to the point that it was hard to shift as the clutch was not engaging. I mentioned this to my brother in law the hot rod builder. He got down, reached in and grabbed the clutch pedal and slowly pulled it back enough to notice. Clutch worked like new! Did some more checking and found that the original pedal would bend over time., The Fiero Store sells a stronger pedal so I got one as I was sure the original one would just bend again. Easy installation and like a brand new car again and it never did bend like the original

Just throwing this out there as a somewhat similar situation. From the Fiero Store website:

​​​​​​84-88 Clutch Pedal Most Fieros were equipped with clutch pedals that were a combination of aluminum and steel. Over time, that pedal will flex or bend, preventing full clutch disengagement. Our new all steel aftermarket pedal will last longer than the original factory design and will provide full clutch disengagement. Your Fiero will also shift and find gears more easily. We recommend that you change the two shaft pivot bushings (64358). This pedal does not require the master cylinder rod bushing (64900). This pedal is no longer available from GM. Pedal rubber (50160) not included.
Part # 66423 Price: $44.95