I NEED HELP ASAP!!!!

[92civichatchb18b]

I bought this head from a friend and it says its a pr4 on it...i believe its a b18b but if thats true i bought a b18a valve cover and i thought it would bolt up??? Can anyone please help me figure this out???????

 

[mwvnos]

yea its a ls head...that valve covers are the same

 

[92civichatchb18b]

Then why wont this valve cover match up with it...im lossed???