Slant 6 Cam Upgrade

I am in the process of rebuilding a 1962 225 aluminum slant 6 and wanting to upgrade the cam slightly for improved performance. What would be a good cam for street use that idles smooth? The block has been bored to 30 with no mods to the head. I plan on adding a 4 bbl. & headers. Would I need to change the stock solid lifters, push rods, rockers, valves, etc. with this upgrade? Any suggestions would be appreciated.