Never trust the specs. furnish with the springs with no way to verify the actual pressures
Take them to a shop with a good valve spring tester and have them set your springs up while verifying the pressures, I like to see 140 to 160 lbs. on the seats and from 325 to 375 lbs. at max lift with at least .060 from coil bind on all 16 springs
You need to use a set, pair of, checking springs to get the actual lift at the valves first before setting the springs up so you know the true max lift with your rocker arms also