'65 Cuda - 273 rebuild or swap?

I was on my cell phone earlier. I wanted to keep my Dart close to original so I rebuilt the Charger 273 to close to stock specs. I did some head milling and porting and used a Isky E-4 cam which is close to stock. I kept the intake, carb,dual point, and used the stock exhaust manifolds with the HP single exhaust. It cost around $3000 for the rebuild and I am pleased with the results.
What you choose to do with yours is your choice. Rebuilding the 273 to Charger/Commando status will cost more than a simple rebuild on a 318 but mostly because of the pistons which are available from Egge or Kanter. The rest of the machining will cost the same. Now if you can find a 318/234/360 in good shape and drop it in without rebuilding it you may save some cash. But there are so many things that have to be or should be changed with a bigger engine though. Like I said before you may need a beefier transmission and rear end. If you put a 340 or a 360 I would recommend a set of headers and performance exhaust instead of the 273 2 barrel exhaust. Which ever way you go you will be finding a 4 barrel intake and carb too. More $$$$'s.
As said before, think it over and figure which direction you want to go. Good luck and keep us posted on your direction. toolmanmike