thanks Matt. I don't plan on oiling through the lifters just trying to figure these things out. I have two motors the stock stroke 360 that has the comp 575 roller. and the R3 stroker im building. I plan on using the long lifters like weedlayer without any oiling changes on the R3(just some grinding to clear the bars). the stock stroke only has one side (right) blocked was just trying to figure why only one side. the motor was runnng fine. I think this is good info for the archives. can anyone explain the bushing and tubing process(how it is done)and why only one side is blocked vs both blocked. thanks again Tony