Any decent cam company springs for a B/RB Mopar cam with up to .525 lift should work fine, I shoot for 125 Lbs. minimum on the seats and from 300 to 350 lbs. opened at .484 lift on the valves up scope
Some of the cheaper over the counter auto part stores replacement valve springs aren't worth having or using down twocents

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)