Possible: Yes (Cleveland style bolt-on rockers) Performance: no Economy: no Stock rockers are fine for stock or mild engines, just use a good quality zinc oil or a moly additive to prevent wear in the pivot over a long period. Roller rockers are mechanical insurance for a modified valvetrain ie: bigger cam, stiffer valve springs, higher rpm. With the greater forces involved with all of these aspects, the roller pivot and tip reduce friction and wear. The oil stays cleaner due to reduced shearing/breakdown. If you ever do go down that path, don't skimp on the quality. Lots of tiny hardened needle rollers floating around your engine is what we call a "Chernobyl" in the trade. Sent from my CPH1607 using Tapatalk