I'm not in to the US prices but I think with 15k you should be able to bild up a S14 JDM style. Which version do you wanna get S14 or S14a (different headlights). As for the conversion you'll need the SR20DET (there are several versions there as well cause you can swap in the engine from all generations depends how much money you want to spend). I'm not 100% shure but you'll need the tranny too, 'cause the KA and SR trannys aren't compatible. In looks there aren't much differences except of the badges. Additional informations will follow