I would not use a needle bearing roller lifter for the street. it would be just a matter of time before it fails and sends tool steel shavings throughout your motor. I only use bushed lifters....
Hmmm ... at the Indy Mopar show I asked the Crane rep about using the bushed versus needle bearing lifters on the street. I always figured it would be a better alternative too. He TOTALLY disagreed saying the bushed lifters would not hold up under low rpm use. Part of the reason being that the bushing is solid bronze, not sintered - which couldn't take the beating of a lifter. Therefore it doesn't retain lube and would just burn up. The needle bearing on the other hand would retain some lube in the space between the rollers.
As to the OP's question, with a stock, unbushed lifter bore you need a lifter that has the roller wheel shrouded, otherwise it will expose the oil galley at high lift. I don't know about the lifters you're looking at but the Crane 66550 lifter meets the criteria.
