Hotrod beat me to it, and did a much better job than I would have.
If you have not started the engine, change the cam to match the lifters.
If you have ran the engine, change lifters and cam together.
I goofed many moons ago as a young kid (didn't know anything) and put solid lifters on a hydraulic cam. (Didn't figure that out for years) The engine never did run quite right, and had no power.
Always do cam and lifters together as a set.
Last edited by Roy Rodgers; 04/29/2012 3:17 PM.