How much improvement will I see?
That's a lot of initial for that size cam. In all honesty I would look at running a 600/650 Holley with your combination here's why:
To give you an example I ran mid 12's at 107 with a similar weight and camshaft but with less carb, less intake, less head and less gear. I had tried a 750 and 800 but it ran quickest with a 600.
Borrow one off of a friend and see how it goes.