ProComp/Speedmaster aluminum heads

PRH said

I’d def have the springs tested.

The ones I had here, which were a dual spring w/o damper, that used 10* retainers and locks...... listed as for use with flat tappet cams....... had waaaaay less spring load than the specs that were just posted.

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Remember a discussion about not being able to use my valves from my cast iron heads, but wondering now if I can just swap my Springs over? I guess I'm not sure if the retainers and such would fit? Or would I just use the spring itself with the same retainer?