Same block same cam same lifters- safe to reuse? Setting preload?

drop em in, torque em down and they will bleed down within 10 seconds. rotate crank 90 degrees and wait again. lather rinse repeat.....Hydro lifters are not designed to stay pumped forever, the clearances are just not there. IIRC Johnson white paper stated leakdown test were 2-10 seconds per hydraulic flat tappet lifter. Cant find it now but think of the time the lifters are under load, milliseconds in their cycles. They dont need long retention times.