Cure for lazy Magnum...Has anyone built a Magnum for 7k+ revs?

you need to recurve the dizzy also, the 5.9 camshaft has less duration and lift than the stock 5.2 magnum camshaft. I say dizzy with fbo limiter plate replace the heavy spring with mr gasket mopar kit, swap that camshaft for something 268/270 should rev good, but dizzy first