I dunno about no pylon racer, but it sure looks like a nice shoulder wing sport model to me! I love my meagre collection of old Berkeley kits. And Jetco hand launch gliders.
There was a time pylon racing meant sedately buzzing around a course with single channel models or enormous deltas with Veco .19's blistering around at 70mph.
Nice project. I have a Berkely Payloader (PAAloader.. what is it now, I'm too lazy to go down and look?) framed up but with a little damage. It would easily resurrect into a sweet little .020 2 channel.