If the clutch pedal stuck to the floor. The clutch slave cylinder in the bell housing is failing. You can bleed it which might make it last a bit longer. When it fails completely. Get a C-MAK from Joe @ ZSpeed.
The clutch feel on the 370 has always been a bit different. You're not the first one to bitch about it. One member on here sells a replacement spring for that spring you seen under the dash. Then there is a replacement pedal assy that is adjustable for feel and travel. It's RJM. Alot of guys have switched to it.