changed clutch, car not going into gear???HELP

[nismo_drifter]

so i changed my clutch on my 95 s14...i went out and bought a stage 3 from clutch masters and i installed it yesterday....the clutch and pressure plate went on just fine but the throw out bearing i got was completly different and there was no way of me putting it on so i decided to use the stock one until i could get a new one then just swap it out if i needed to...so i plugged the tranny back up and finish putting everything together and bleed like half of a bottle of brake fuild (big bottle)...

now when the car is turned off it will go into gear but when i start the car it will not go into any gears, its like im hitting a wall???then i started the car while it was in gear and the car felt like it was going to die and i slowly let the clutch go and the car felt like it was taking off as if i applied gas to it???

so i called the guy at the shop and he tells me its the throw out bearing, and this is happening because its a stage three clutch and the stock throwout bearing is not strong enough???so he is getting me a new one...

so is it the throw out bearing or what???please help out guys....thanks