Are 273 rockers true 1.5?

I gotta disagree. If my ring gap varied by 15% or so it wouldnt fly. Neither would crank journal clearances that vary that much, or lifter bores. back in October I posted for help with a new cam and a valve tap. turns out the stock "wide tolerance" factory rockers were the culprit . The factory rockers measured all over the place. Lift only went from .475 to .480 but there was a pronounced rocker tap. Went to a more precise Comp Pro Mag adjustable roller rocker. No noise, better manners, and yes you can notice the difference when your valve geometry is spot on.