What? Are you asking me to point out someone that's put adjustable rockers on a Magnum headed motor? Man, you're crazy as a bed bug. Do your own leg work. I told you HUGHES ENGINES makes MAGNUM SPECIFIC roller rockers. CRANE makes a kit to convert them. The Crane kit has been out probably thirty years since it is the same as the small block Ford kit.
Here's one kit from Hughes:
http://www.hughesengines.com/Index/...a2VyIEFybXMgJiBBY2Nlc3Nvcmllcw==&partid=25405
Here's the other kit from Hughes:
http://www.hughesengines.com/Index/...a2VyIEFybXMgJiBBY2Nlc3Nvcmllcw==&partid=25628
Here's the Crane kit that allows you to use SBC rockers:
http://www.summitracing.com/parts/crn-36655-16/overview/
You think with all that available that nobody's done it? Are you that obtuse?