mech to Hyd CAm, Springs

I have a set of 906 heads I would like to use on my mild 383.
The heads have 2000 miles on rebiuld and have hardened seats
Question:
The 906 heads have valve springs for a 575lift @.050 mech cam
I am going to install a mild 232dur 470 lift @.050 Comp hydraulic cam in the 383.
Can I use the mech cam springs on the heads now or should I change them a lighter spring to match the Hyd Cam


Thanks for your help