I have never worked with Gsr motors before and i bought a Jg pro series head and there is a threaded hole on the back of the head just behind the distributor and I was wondering if someone could tell me what goes in this hole. thanks

 

got a pic????
Im looking at my stock head right now and if its the same spot there is just a golden bolt in there plugging it off

 

a plug or you vtec lines if your running a ls/vtec

 

thanks that is what I was hoping would go there.