I sat in the Recaro, standard issue, in the 2020 GT 350, seemed a a little tight and could be uncomfortable on a trip of any length. In the 2020 Ford performance Catalog, page 26, I see a 2018-2019 Mustang "Ford Performance" Logo Recaro seat set M-63660005-MF. "Similar to the optional Recaro...
These add ons seem to be an incredible value, and they don't void your warranty as they are Ford Performance products. I am thinking PP3, get GT-350 intake manifold, 7mm larger throttle body compared to 80mm stock, cold air intake and an electronic tune, at 7,500 RPM, a 60 HP boost, + torque...