RE: pusher or puller prop
A pusher prop will most simulate a "jet" aircraft. This due to the lack of prop blastover the surfaces. A prop driven "jet" will have better accelleration due to higher thrust, if power values are equal. But the ducted fan will usually have higher speeds. There is a point where a prop can act as a brake, if the airframe is cabable of faster speeds than the pitch speed of the prop. Because you posted in the electric forum, I cannot help you on I.C. moter choice and prop values.
But, a good thing to remember is, if you prop for high maximum speed with the power available(expl: smaller diameter/higher pitch) this detracts from thrust/acceleration. If your plane is designed for turbine, it may not like slow flight very well without flaps and other slow flight scale additions. For this reason, safer flight may be had as a "puller" installation. There are many more variables here for success. Good luck to you.
Steve