Did you see on their site were they had a complete set for 860 and a set for 960 or something? And I know one set is for flat tappet and one is for roller but I don't think that's the case in this instance. I think they're both flat tappet. And also I believe there rating the flat tappet solid and hydraulic as the same spring? And then roller lifters weather hydraulic or solid with their own spring?