MRL just finished my engine, std stroke 360, fully ported alum heads, 10.6:1 and flat tappet, 550 lift cam. And yes, it likes rpms. Makes well over 500 (thread coming soon). With the OP's combo I can see about 400-425.
Ok then... Let's see what they say about this.
Not much different from my setup, just bigger cam and maybe more head work.
Post as much as you can about your build I would love to see it.