I mean you won't have 20psi before 5000rpm with -10s on a 2.6ltr
That can't really be put in the same sentence as responsive (Wait till Piggaz see's this thread lol)
At a minimum you'll need injectors, exhaust.
I'd also say to make the most you'll need super cams, heaps of head-work, bigger valves - basic terms - the works, and then some.
You'd be aiming for at least 25psi as a starting point as well. Depends on if the motor will take that however with timing in it. Totally depends on how it was built. Might find its not even possible.
All of this assumes you have a expensive bottom end too. Just your normal standard rebuild really ain't going to take that, especially the RPM part. You would need to spin to at least 8500-9000 to get use outta the power range on the 2.6