Got a set of solid roller lifters for my Ford FE 427 stroker (484 cu/in). The block I'm using is a '66 427 solid lifter block, not drilled for pressurized oil feed to the lifter bores. To use solid roller lifters I need to use needle rollers. I'm not sure of the brand, seller thought Crower or Lunati but he's not sure. How do I tell if these are needle or bushed?