340 lifter noise

could be a number of things. low oil pressure. rocker arm or shaft wear. or a combination of 30 weight oil and low oil pressure and worn rockers and/or shafts. story: i bought a charger, 65,000 miles, 360 4 barrel. had not ran in 8 years. messed with it , got it running, drove it home. it had lifter tick from the get go. changed the oil, new filter yada yada, still ticking. new cam/lifters/oil pump, still had a tick tick. got me a set of used rockers arms and shafts from a junkyard 360, BAM no more tick. factory rocker arms will wear to the point that they actually create a valve lash until the lifters pump up. and if they are really bad, the tick never goes away