The advantage to putting the rear shock tower up front is that it makes the front symetrical, which makes it easier to tune and also move the front shocks out farther if you need to. It is a perfect fit you do not need to do anything. I race these setups w/stock and 19 turn mod., I have not tried them w/a full mod motor. Saucing my tires is just what I call putting traction compound on my tires. It really doesn't matter what brand you use I prefer the odorless ones just cause they don't smell bad(no other advantages).