Run the Lunati if you have to pick from one of those three. The tight LSA and big duration will hurt the low end, but you have a 5000 converter and 505 ci. It will also come on like a freight train in the mid range and fall off early because you have a limited cylinder head and 505 ci. And finally, it doesn't matter if it falls off early because you have 4.10 gears and 505 ci. You also want to drive it daily, so you might as well make better mid range peak power where you can use it, than better average power where you can't.