I have a thought on the engine and it is not DC3. But it could be. I know that just sounds wrong However if my memory serves me right The DC3 had pratt and whitney R17 30 which was two rows of seven. After the war there were so many wright 1720 engine that were taken out of B17's that some one got an STC to put them into DC3's so a DC3 could have either one. Yea, I think that is right but don't put any money on it.
Bill Rutherford