I dug into this thing yesterday and I should have posted this topic on the non fe forum my bad. but my findings after I took the top off and looked in their. the lifters all look really good except for one it had just a nick out of the edge which I don't know if it did it on its own or if I missed it on assembly. that being said I also have found the rockers are tapping into the mounting stud, so I had to buy a set of elongated slot rockers to solve this. this was a surprise to me because when I ordered this cam and lifters it was all supposed to work with the factory rockers. which is what comp cam told me. so i think that this combo is "borderline" on using the factory stuff, not a problem for me i just told my dad to blow the mold out of his wallet and now were gonna put in the good stuff. my lesson from all this really does show me why i like building and tinkering on the fe. it to me in my opinion was ahead of its time, but like any motor they all have their pros and cons. but i do know for sure now and have taken for granted all these years that the shaft mounted rockers are just far far superior to this stud mounted crap.