[BR3W CITY]

IMO the fuel itself isn't the factor, its fuel delivery. You can make 1k on pump gas, so long as you have enough pump and injectors to keep up supply (this is theoretically speaking, there is actually a point in which the octane rating of pump fuel is no longer enough to prevent detonation based on cylinder pressure and temp).

We've had plenty of cars/trucks making 6-1200 on pump gas (both with and without nitrous). A good pump, injectors, and tune will get you most of what you need. Methanol is a VERY easy add-on if you decide that you need a little bit more oomph.

IMO if your considering making changes to the rear end, putting together a 9" isn't a bad idea. Sell the 14bolt to the off-road guys looking to run 37's (if its an FF, they want them).