[spacemanspif]

Cost vs. looks is all it comes down to. The body kit front end would do the same thing but the splitter that's kinda built in would increase downforce a little. Usually body kits would not be a gain due to the front bumpers typically having giant holes for cooling and better looks than a solid front bumper. Some Astros had pretty big factory dams I thought, if you don't have anything search around and look to see what factory options were, fit and finish will typically be better with factory pieces and a junk yard dam would cost about the same as a DIY dam.