Why do you think it will end up sweet? 35IBU is pretty high on that low of an OG beer. On low OG beers you typically need to mash high to leave a higher FG so the beer doesnt end up insipid and thin. I doubt it will end up sweetish.
On the flip side of things, Ive long thought about doing a smoke peach table sour, or here in the desert SW they smoke agave hearts (tastes like the best sweet bbq youve ever had) which Ive also wanted to use in a sour beer. So if youve got nothing to lose, give it a shot.