How do you want it to idle and sound and how far do you want to rev it?
My guess is that the comp xe268h is a very good choice for your app because it will have a bit of a lumpy idle and should rev to around 5500 rpm but will still pull strong on the bottom because of your gearing.
You might want to check out the Hughes Engines website. Dave Hughes has been specializing in Mopar engines for years and really knows what works for a particular application. Tell him what you need and he'll supply it or give you a custom grind.