Erin, whichever style intake you use just don't go with your stock one, you need the new style because you'll no longer have the cathedral port heads to match the cathedral port intake. I seriously doubt you'll lose any power with the car style intake, it'll just move it higher in the RPM range. Not ideal for a crawler, but probably a non-issue for your style of driving. Run what fits your packaging and budget.
You won't necessarily make more power with bigger injectors because engines tend to make more power running a little lean. So you'll be making plenty of hp right until you blow a hole in a piston....sound worth it to you? Get the right injectors, optimize your AFR, and keep yourself from having to do this again next year. We all know you're not easy on stuff, so might as well build it for reliability from the get-go.