I purchased some edm lifters to use with my new Ultradyne cam. THey were the barbell looking type and I lost all oil pressure because they were uncovering on the downstroke. So my machinist ordered me a set of Howards Cams edm lifters. Got them in today and they are too tall! I thought all small block solid lifters were the same length. The seat where the pushrod seats is higher up in the body of the lifter as well. I would have to have pushrods at least .07 in shorter. Has anyone out there run into this? I'll call Howards Cams tomorrow but I was curious and hoped I might get an answer tonight.