/6 to V-8 swap question

The Duster was a drum but converted to disc with the kit. The valiant is disc. I have not swapped a K frame before and was looking for the easy way out. Also have minimal room to work on in the garage if both cars are side by side. I will have to do that for the rear end swap but was going to yank the motor from the Valiant, push it out and pull the Duster in for the swap. The drive way is sloped too much to jack on safely.