LS rockers on a Mopar?

MopaR&D said
A lot of guys asking "why?", Derek explained it all. It was all stuff his machinist/engine builder friend already had lying around. Maybe he didn't have a set of Magnum or LA rockers appropriate for 7000+ RPM but he was likely tripping over the LS parts. There is no good reason to use most of that stuff aside from it was already on hand and it was easy to make it work. Same for the Viper rods. The guy's used to working on more modern high-end stuff and Derek just came to him and asked, "I want a rowdy 318 SBM as cheap as possible."

...and that's reason enough. If you don't have one thing, you make another work. That's hot rodding. But I still maintain for the sake of "just doing it" that it adds nothing we don't already have. That was my argument. Now, if this had actually added a benefit, I'd be all over it and if someone else is in the same position, "I guess" do it. But what's all the machine work cost? More than the correct rockers, I bet.