340 lifter noise

i have the stock valve train which is what it had before i tore it apart,i was sure the felpro thick gaskets were the cause,which is why i put int he thin mopar.025 gaskets.its a hard lifter noise and it doesnt sound like one either.i think its hard to believe a cam could be bad from just sitting ,or the lifters ,i dumped oil all over them before i put the inatke on last night.and after i shut the engine off there doesnt seem to be any play in the lifter pushrod area.