My 95 se has problems starting. Turn the key over to start and its like the battery isnt there, or turns and turns and doesnt start til a few tries, For some reason the negative block ground wouldn't go in the spot behind the starter so i bolted it to the exhaust connector manifold.

It probably has a poor connection. Fix the connection and let us know if that fixes the issue.

Yeah, it was, somehow the poitive post came loose and the other post nut that doesnt have a wire on it. Another question I have real quick is that I have the engine out of a 2000 regal and I didnt think the tensioner would be right so I put the 95 tensioner on and scrapped the other one, well now the belt is too loose and squeeks and belt dressing only makes it worse, whatother car and years tensioner could I use that will match up?

Have you tried a smaller belt? That could fix the problem assuming the tensioner is keeping tension where it is needed.

A 95-99 H body tensioner will work.

I just rememberd that when I put the 00 regal motor in it I used my 95 bonneville starter and when I went to put the battery ground wire on the block it wouldnt fit because the bolt is behind the starter to where it wouldnt fit, I have it bolted to the exhaust connector and that is making it either click and kill power or turn and not start, where else could Ibolt the ground wire to besides that spot on the block that wont fit?