should I keep the k-frame

hey guys, Im looking to start rebuilding my front suspension, ( bushings, tierods, shocks, ect). Ive been looking for a complete 73 a-body front k-frame for a v8 with disc brakes to redo and slap under my baby. Ive seen the products in mopar muscle that say you can do a swap kit from /6 to v8 motor mounts and keep your k frame. If this is ok I could just rebuild the front on what I have and change over to disc brake kit with new hubs for larger bolt pattern and get the front suspension and still be able to drive it with the /6 untill I can drop the 360 in latter. Any down sides ???