1980 kawasaki ltd550 bike for 4 speed for my '72 dart

hey guys, I hope this is in the right place, I have a 1980 Kawasaki ltd550 bike, it has 16,900 odd miles on it. It's in good shape other than a little rust on the handlebars and the seat needs recovering. It runs awesome, I had the carburetors rebuilt a couple months ago, cost me $300. I'm the third owner, but I know the original and second owners (older guys that go to my church).
I'm looking to trade for a full four speed conversion for my '72 Dart. My car currently has a 318 and automatic.

I'm located in Walhalla, SC, which is in the northwest corner of SC. I am willing to travel some to trade.

So, any interest?
Thanks guys!
Luke Smith