Lance, I recommend Harland Sharp roller rockers. I have been running the same set for 30 years and have not had a single valve train related problem.
http://www.summitracing.com/parts/cs...make/chevrolet
But please, before you switch ratios check your valve to piston clearance and also your valve springs for coil bind! Going from 1.5 to 1.6 will make the valves open further so you need to make sure the valves are not going to hit and springs are not going to bind. Don't rely on what some magazine says will work, they are not going to fix your engine if it goes wrong. I would hate to see you install 1.6 rockers only to bend some valves or break some springs and be sidelined for the season from engine damage. It can get pretty expensive to repair that damage.