For most applications the CO is fine. The stock 428 oiling system is not quite as good as even the 427 CO (more bends, smaller diameter). So, that sould tell you that your drag racing buddies have modified the oiling system (common) or that oiling is not going to be a problem. The big difference between SO and CO is that the SO puts
oil to all the main bearing first. Whereas the CO hits the first main bearing, but then up to the camshaft bearings and lifters and then back down to the remaining mains.