mustang 5.0 swap grinding noise

ok some of you already know about my 99 mustang that has a fuel injected 302.....

so i took it for a first drive today

i have already done a few burn outs out front just to fry the tires ya know playing and didnt have any issues that i know of

Now it didnt do it at first it started it after about a mile from my house it all of a sudden started to make a grinding noise..like metal on metal

thought it might have been the throw out bearing but i dont think that is it

doesnt stop even if i push in the clutch, also wanted to throw this in..for everything that i have done i had to shorten the drive shaft from 47" to 45"
had alot to do with engine placement and the rear i used

but anyway also while i was driving i noticed that in my freshly built tremec 5 spd that i dont have 5th gear i mean i can put it in were the 5th is supposed to be and it will stay there but it wont do anything

so if anyone has seen heard or had this problem please help me figure this out and anyone who might have an idea of what it might be let me know

before anyone asks...i dont think the clutch plate is on backwards cause upon my knowledge in only works one way ir if you COULD put in in backwards it would probably break or some stuff like that

thanks
Alan