I've never lost to a SHO personally at any stages of modification.
You will have to nail the launch to win. Their stronger TQ will beat you in 3rd gear. (or make it a shorter race)
Don't go by 0-60 numbers. Baseless numbers for our car since it takes a shift to 3rd.
You also appear to have no mods outside of increased weight. (All that stereo shtuff)
I'd have to think you'd lose either way.