Trans Problem car hard to put in gears

[drtbiker]

I have a 87 mustang 5.0 gt, had stage 3 clutch put in. had for over 3000miles on clutch but trans is very hard to shift, when i try to put the car in gear it is very hard even with the clutch all the way to the floor. Some times if i dont let the car warm up and drive and shift into second i will have a slight grind even with the clutch to the floor. i dont feel that it is the clutch. My only guess is that it is the synchro because it wil grind into reverse if i am not higher than 1500rpm or at 800 or lower. I also heard that it is possiable to be the trow out bearing