Which stroker kit for 470" b-engine

to the OP- I have had the RPM heads- fully ported & beehive springs in a stroked 440- to 489; running
a solid cam 260@50 & .650 lift.
Are these the standard Comp Beehive springs (I only see one choice)? Those are pretty strong cam specs.
What are the limitations for those springs (lift, camshaft type)? It's good to hear they work with your setup
as I am considering a slightly milder solid flat tappet grind and may want to use the same springs you have.