572 Build

Just my opinion but as long as the springs are kept cooled and the idle time is kept to a minimum you shouldn't need pressurized lifters. There should be a large volume of oil returning through the valley and over the lifters. My street engines that have solid rollers only have .035" hole in the bushings for presurized oil. And these do see a bit of idle time (traffic, etc.) You shouldn't have any more trouble with the cam breaking provided the springs stay healthy. Run the best you can find.