Bud,
I started last fall to look into electrics, particularly for 1/2A models. I have had good luck with motors froms hobbypartz.com, namely the the Alpha 300 series and 370 series. So far I have flown two 1/2A's and a Flying Clown with electrics ( the clown is only 6.5 ozs without motor and is almost a 1/2A) and like them very well. I am just starting a new plane and plan to use the Alpha 370-1360. It is a Curtiss yp-37 with about 130 sq in. I've attached a copy of the drawing for your reference.
john