Comp wants you to use something a little better for this camshaft.
They recomedn their medium size 986-16 spring.
I use a stock diameter high pressure single spring with similar seat and open specs.
This Summit racing Spring is similar to what I'm using
Others are Lunati 73943
Pioneer Automotive 810107-4 - SummitRacing.com
You need to order 4 units to get 16 springs
They are packed as a 4 spring set pack.
Crower Performance Valve Springs 68304-16
Comp valve spring shim kit #4753 You need this to correctly shim the deep exhaust spring seats
to get the installed height right.