Slow leak down/ Short travel hydraulic (roller) lifters anyone?

We're in. Dany's Magnum swap in the '66 Cuda has Hughes 1110 springs/retainers.
If it sets a few days, the springs are strong enough to collapse the lifters.
She either needs to crank it a bit to get oil pressure up, or they clatter for a bit.
WE NEED MORE INFO!!