
I don't see any reason for anyone to get mad at this question. i was in this position 3 years ago myself. Yes you can use body parts from other cars, and be lucky and have them fit right on, or for a bit extra, you can have it custom made to fit your car. My front bar is from a 200sx s14 series for example, and was custom made to fit my car, my side skirts are from an HSV holden commodore, and luckily, fit the length perfect. As for Kia motors/gearboxes, i'm not so sure of the kia lineup, but i know that there is one model of large 4 door sedan that is fairly similar in look and design to the sonata. I think that the side skirts for that car will fit the sonata, but i'm not positive of it. With the gearbox, best thing to do is go to your local mechanical library, and have a look at the bellhousing (face of the gearbox) measurements and compare one to another.