What sort of cam are you running? If it’s a solid roller, don’t skimp on any valvetrain gear. If it’s a flat tappet cam with mild spring pressures, most rockers will survive, but I agree with others that in general needle bearings should be avoided. There’s literally no advantage and the potential for disaster can’t be ignored. I’ve been running a set of bronze bushed stainless PRW/ProComp rockers on my solid cam 451 for nearly a decade. I typically do an adjustment and look them over closely each spring; so far so good. I’ve had them off the shafts a couple of times in the last few years for various reasons; shafts look great.