340 Stroker mainly for street, what gear would you run?

nothing wrong with that at all

450 hp is a lot for the street. Remember when Mustang 5.0’s had 225 HP and that was a big deal? This is double that.

450 hp and lots of torque will rip the rear tires off on the street at will.

will be more street friendly than a 450hp 340.

Its really not, every commercial 1/2 ton pickup now makes approx 450. As someone that has owned over 2 dozen 5.0 mustangs since 1993, a super majority of its snappy performance was due to the EFI set-up, the 5.0 came into its own after its introduction. I have witnessed many 300-350 hp 5.0’s take down cars well outside their league.