What Timing belt do i Need??????
 

Im wondering what timing belt i need for a mini-me!! I have a jdm d15b block and either a y8 head or a z6!! Im not sure on the head!! The belt thats on there isnt bad but it seems to loose!! i can literly pull it off the cam gear with moderate tugging!! Is there a way to find out what head i have!! Thanks in advance for all the help!!