Getting ready to swap a 5.7 into my 73 Dart Swinger

K frames are completely interchangeable. Mounting points to the frame are the same, no matter what engine. The actual mounts welded the the k frame are what is different between /6 and V8.
Jeeze finally some good news I'm on my way to get the k member right now. Same with the camaro I lt1 swapped late last year just swapped out full k members. This dart had the 440 so i don't know if it will have any value but I'll put it together a package of all wiring some kind of ignition box and k member package set up for 440 swap. 150$ Otherwise will be trash after a few months. Again thanks for all the help!!!!!!!!!!!!!!!!!!!!! These mopars are not easy to find parts for like my camaro and suburban. Sad that they are going to crush a 75 duster after April 2nd at my local pick a part. Anyways hopefully back on track this was only projected to take 6 months to get it strarted, rolling and into gear(vitals) Dailing in the body and final car will be about a year from that finish point. Therefore my relentless efforts for progress.