just finished doing a ls/gsr head swap and had a wierd noise coming from intake manifold area like a blow off type sound every second or two i hear it...could it be that the pcv valve is not plugged in? i have a 99ls bottom and a 95 gsr head and there is nowhere to plug the pcv valve into cause it would regularly go into the gsr block but i have the ls one..any help appreciated

 

no help?