Transmission problem

[Ace370zz]

What’s up guys, so recently I bought a boosted 370z and it has a super twin desk clutch and the previous owner isn’t sure if it has a Heavy duty slave cylinder or a cylinder delete. Now every time I try to bang gears it doesn’t let, it’s like there’s a wall there for a second or two then it goes into gear and it does that to every single gear. If I shift normal then it’s fine.. also sometimes when it’s cold out and I got to put it in reverse it grinds. My guess is it could be the clutch or slave cylinder… Any idea what might be causing these issues and did anyone have a similar issues?