Exactly your mounts are just as stiff but you only had half as many inserts as me. I used 2 per mount making them stiffer than your 1. YOu only filled 1 side which will reduce wheel hop significantly but will still give you a lunging affect while letting your foot off the gas at high rpm. Better than stock, but more than mine, which will do it more than mounts like joeys.
Your right ill lay off the stalling.