2 part Magnum cam and valve spring question

I should have told you.Roughly .410 lift on both sides,roughly at.050:intake 190,exhaust 205.109 on the lobe centers.Roughly .510 to .515 with stock retainers.I used the Hughes 1110 springs with matching retainers($175) It is supposed to give you more lift capability, but not positive. The limit to worry at .510 plus is retainer to valve guide clearance.