well valve float can happen at 5000 and if you shift at 5000 you may be way over 5500 .so i make this post short i have to mow the grass hyd flat lifter cam suck for hard use and roller cam s are good for what your doing if your going after it hard... that bull shit lash holds good if some thing as wearing or bending then your going to be playing with lash just before it blows up