X2, that's the way I would go and am contemplating it for my Ramcharger in the future. I'd use fuel rails and injectors from a late dodge truck with a 5.9, a throttle body from FAST, the manifold from Hughes Engines and maybe see if I can fit a stock truck EFI pump in my tank. There's lot's of little stuff that I haven't hashed out yet but I've got a ways to go before this happens anyway.