Mild 440 break in springs?

Hey guys i had a flat tappet cam fail on me last weekend and i decided to give it another shot. i was wondering what springs people have ran for similar setups as mine for cam break in. .507 Lift On stock heads. the kit i got had single springs that came with it. maybe those are fine for break in? ill link the kit as well. i just don't want any more eaten lifters!
Big Mutha' Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chrysler 383-440