LS valves in small block

[2000silverado]

did you guys know about putting in LS valves(1999-current) in early small block heads. u just need 8mm inserts for the guides and the valves. the intake valve stems are hollow and the exhaust are sodium filled. lightweight and big valve size!!!! u can also use the lightweight beehive springs. some machining is required but it is a good suggestion for lightweight valvetrain!