Here's a Skyraider I built in circa 19--ought-74 from Howard Motten's (or maybe Motton or Mottin) plan in Model Airplane News, sometime in the last sixities. 

I hand-scaled it from the mag and flew it in the 1975 KOI, and also a few local contents until the sliders took over.

Per the article, it can be flown in either I or II, if you set up the RC-radial engine mount right.