Just my . I'm a big fan of solid lifters,but hyd cam still have a place. The problem that I see with hyd cams is whether the hyd lifter can accuratly do what the cam tells it to. With the mild old school hyd cams it generally is easy to get a good match,as cam companies realized the public would buy the faster rate must make more hp theory they designed them,the hyd lifter often causes this to end in dissapointment. There are plenty of hyd cam lobes that don't require anything special to run well at 7000rpm and some that are a pain to reach 6000rpm with lots of "special" parts. Solids eliminate the hyd uncertainty. Hope it makes sense?