I know that this thread is four years old, but if you have detailed your chassis to include brake and fuel lines, e-brake cables and linkages, wiring and other features, you are going to want that judge to look at the underside to determine that it's better than the car next to it with the same quality paint job and none of the underside attention.
Another way of looking at kit expenditures is considering what money you use to pay for them. Money from a pay check that is budgeted for bills and the cost of living in general feels much different than using "found" money. A couple of years ago, I hauled a few old Ford C4 transmissions out of a yard for free. A couple of weeks ago, I pulled a bell housing off of one, cleaned it, bead blasted it, and put it on Craigslist for $75. It sold in one day, and was sent to Milwaukee. Seems everybody knows about the national craigslist search engines. So that's basically seventy-five bucks for free, doesn't affect the bills, bring on the Super Duty kit.