I just put my z6 head on and my timing belt is loose, Im using the stock one for now becuz the damn crank bolt refuses to come out. So when i put a z6 belt on it should be all good? O and its a b1 with pm3 pistons? is that normal for the b1 to have pm3 pistons?

 

Stock belt no.
Z6 yes.

 

so no matter what i cant run it with stock belt.

 

you HAVE to change the timing belt. no way around it

 

Get a impact or a BF Bar and get the crank pully off and put the right belt on.