I ran into the same issue when i put my headers on. I thought it felt so slow but It’s just the loss in torque your feeling from getting bigger headers plus not having catts.
Well on behalf of my experience, yeah I would say you'd be fine. I honestly didn't have much sway if not any. Nothing dramatic at all. I'm sure it would feel a little different once u start trapping 130mph+. I was in the 114-115ish mph.
Yeah I drove them back home. I just put the tires to 29 psi before I hit the free way. They drove great. They actually supprised me how good they handled on the free way. Drove 70-75mph all the way. I didn't feel any sway. Totally doable!