I have a 00 z28, when i take off in first gear and shift it bout 5k and then hit 2nd gear and shift it at bout 5k, Then i get ready to go to 3rd gear and my clutch is at the floorboard and i cant go into any other gears it takes a lil bit then the clutch will go back up normally??

 

First, check the fluid level, and condition. Replace if neccesary. How many miles on the car? Has the clutch ever been replaced? And if so, when? Does it make any noises when driving it normally? Does it ever pop out of gear? Really, we need some more information. However, it sounds like it could be one of a few things, worn throwout bearing, bent shift fork, or even worse, worn out syncros. But without seeing the car in person, that's all I have to go on.