Speaking of Springs for Magnum Heads and Hyd cams.....

Anyone have a recommendation for a valve spring that works on a magnum head with factory head going on a LA block with a hyd flat tappet? I see the Hughes 1110, they have 120# on the seat which to me seems just a touch high, would be nice to find a +.050 retainer as my math says that would knock it down to the 105-110 range. Or anyone know of a different spring that would put about 100-110 on the seat and clear a .540 ish lift cam? I found these: Trick Flow® by PAC Racing Single Valve Springs TFS-16942-16 They say good for .500 lift, they look like they would "bolt on" to a factory magnum head, but if you ran only about .060 coil bind clearance they look like theyd clear .540 lift. Any other suggestions as well?