valve spring ??? for the mopar guys

my thing is this the spring he rec. me get is the same spring or 1 of the springs that they rec. for the 306 555/555 cam that I have...986-16 works for 306 555/555 and the 282 520/540 just looked and the ret. the same and the locks are the same.....

old cam 306s
260@50
555/555 lift
4000to7000
110 lobe center angle
106 intake centerline

new cam xs282s
244/252@50
520/540 lift
2500to6500
110 lobe center angle
106 intake centerline