if the rockers are used they get a 1/2 moon mark worn in them by the valve stem and they will go in and out of lash so if you can hook your nail in the bottom of the rocker arm then they junk .are you runing long slot rockers how much lift do you have ?the lunati is re box lifters try to get a set of jonson lifter they i think are the best after holley took over lunati hard to say where them lifters came from