Technically not even a DC-3. It's a BT-67. Different type rating even from the DC-3. Basler takes a C-47 airframe (conversion cannot be done with a DC-3, need the heavy gear of a C-47) and zero times the airframe. Cut the fuselage in half behind the "chopper" door and install a 47" plug in the fuselage to lengthen it. For CG reasons - if you look close at one you'll notice the chopper door on the piston plane is right in line with the prop arc, hence "chopper" door. On the BT-67 the chopper door is again right in line with the prop arc (P&W PT6-67 motors), even though the turbines are mounted forward for CG and much longer than the 1830 or 1820 it previously wore. Again, zero time the airfame, all new wiring, slight mod to the leading edge of the wing, different wing tip, new everything else - electrical, hydraulic, avionics, all of it. I've seen then with FLIR pods under the nose, radar reflective paint, guns mounted all over. They're used in Central America for drug interdiction, they've shot down planes with BT's before (the gun camera footage made it's way to Oshkosh but vanished quickly - this was early 1990's). I believe only one or so was ever purchased privately, the rest are all US or foreign governments. They were used for cloud seeding programs. Hauling voting ballots around African countries. Really neat airplane.
I grew up in Oshkosh and worked for Basler in the 1990's.