I am having my LT1 heads done by Elliott Port Works (LE1 package with custom cam). He suggested I may be able to use my old lifters and rocker studs. My motor was rebuilt 30,000 miles ago in 2005. I was hoping to reuse my lifters and rocker studs (Lloyd suggested some do). I do know I have 1.52 Comp Cam rockers and MPR-383 pushrods so those were at least changed out. I have no idea what kind of lifter I have though. I attached pictures of the lifters but there are no markings on them. I get buying new things for peace of mind but from what I have read, these seem to be some of those items you can get away with reusing. The roller feels smooth, not sure what else to check for.