Small Block Oiling System Mods

I plan on tubing my 360 block since I will be running solid flat tappet cams. If you aren't planning to run a hydraulic cam, wouldn't you always want to block oil wasted at the lifter bores in some way, either tubing the block or bushing the lifter bores? Or is it a waste of time? My engine will see a max RPM of 6500. Should I just leave it stock?