if it comes to a point that you decide to part it out, i would be interested in the seats and if you come across a good 73 duster grill (center section) i would also be wanting one .if it were me, i would hold on to the 340/4 speed and run the 360. that way you can keep the original 340/4 speed for a rainy day and have it fresh and ready to go,and you can beat on the 360 without the worry of putting a rod through the block and killing the original engine (not that you would but well, just sayin) lol