360 Magnum heads conversion

I guess whether or not you want to convert to roller rockers depends on how much spring you'll have.
Big cam = bigger spring load.
Hyd. roller needs more due to sheer meat of lifters , regardless of grind.
Stock stamped LA rockers hate spring pressure , and I don't think Magnums will be a whole lot better.
As you get close to 300 psi open pressure , you get to where an aftermarket rocker is a good idea.