408 or gen 3 hemi

Why the aversion to forced induction? Obviously a small block V8 can be built to those power levels but usually, getting there with a turbo or SC is a heck of a lot cheaper and the result is much more drivable. It might require selling your current Terminator and buying a flow through FI version (?) for your new motor but I bet you’d still be able to get there with less cash.