syn00 5pts I know this is a very old article: But I am curious! These Hemis are having issues with lifter failure and a so called Hemi-Tick is present!!Is this engine still in service? Where exactly are the MDS lifters located? What Oil did you use in this engine?I am only thinking as well are thousands of other hemi owners if this engine has a lubrication issue within the upper half of the motor.... Thank You!