[STEVE-O]

Cobras,
I have SPF #2259 and my gas pedal was doing the same thing. As Scootter said, make sure the nut holding the gas pedal on is tight. Mine was real loose and there was 1-2 in of movement before the throttle moved on the carb.
Also, the rods under the hood connected to the throttle and carb might need adjustment. In addition to the pedal nut, the rods have a direct effect on movement of the pedal to movement of the carb linkeage.
If you take a look at the rods, it is pretty easy to see which ones need adjustment. Think I had to length the travel from the carb to the firewall and the drivers side to the firewall. The rod nuts use a 10mm wrench.
When you push on the gas pedal, you should see direct throttle movement all the way to WOT with pedal to the floor. Might want to test it with the engine off and pushing the gas pedal to the floor.

Dont have an issue with the clutch as you do. It does grab about 1/2" off the floor but dont notice any slowness with the pedal returning.