Getting ready to swap a 5.7 into my 73 Dart Swinger

Will a v8 k member fit into my orginally slant 6 dart? With no fabrication? I have a headache and a stomache about this k frame ordeal. Also going to get some sheet metal patches ready after figuring out the dash/firewall/floorboards gage of steel. Going to fontana tomorrow to do measurements and then pick up a k frame lots info on Schumacher about the k members. Feeling in over my head cause I cant seem to moce foward with this damn car..