For long life on the street with high RPM, above 7000 RPM, buy the best lifters you can get your hands on, regardless of the price I like and use the Crower brand BB Mopar roller lifters now Contact them at 619-661-6477 8:00 AM to 5:30 PM Pacific time
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)