Lunatic valve springs frustration!

Why on earth do they recomend a valve spring that can't possibly fit on a stock head!? I realize maybe I should have done some measuring but I didn't think I could go wrong with the manufacturers recommendations!View attachment 1715554813 View attachment 1715554814 View attachment 1715554815 View attachment 1715554816
running into same problem.. have a comp xe274 that requires double springs. im trying to find a single spring that will work so i dont have to machine nothing