I think Comp recommends their 924 springs for that cam, but I have run the Comp 930 springs on that cam with no problems, up to 6000 RPM with no valve float. I imagine that they would go higher than 6000 if necessary. Here's a link to the springs on Summit's web site:
http://www.summitracing.com/search/?keyword=cca-930-16&dds=1If I recall correctly, they were a direct replacement for the springs that come with the Edelbrock heads. I'm pretty sure I used the same seats, retainers, locks, everything. You would, of course, want to set up the springs with whatever shims were required.