RE: What type of Propeller?
You don't want to do that..... You are already committed to flying nitro planes... and bigger nitro planes fly better anyway. Going electric is just opening up a big can-o-worms... Since you already have a .65 engine... A nice 60 size trainer ARF will be in the same price range as trying to put a whole electric setup together and will fly oh so much better.
Here, just move the equipment you were going to use in the 'stang over to this and you will be much happier for less money.
[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXCAS1&P=0]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXCAS1&P=0[/link]
Or you can get the seniorita as someone suggested.. it is MUCH prettier... but about the same as learning to fly is concerned.