ticking noise from head cylinder one exhaust side

[night-rider]

so i just rebuilt my engine and used a remanufactured cylinder head, it came complete and i never tore it down to chekc clearances or anything. there is a semi loud ticking noise from number one on the exhaust side, most noticible at idle noise goes away when rpm is increased to over 1000, seems a little worse when hot also, i removed the valve cover and checked all the valve lash within spec, seems highly unlikely to have a weak spring on a reman head? i will pull the cams and inspect the springs ect but i dont think im going to find anything obvious, has anyone ran into something like this before?