These plans are in new condition ... they are Flying Models CF-029 from Jan 1971.. I couldn't find much info on this design but it has a 26" WS for .15 engines .. along the same lines as the Dumas Ole Tiger that came out about the same time when the Good Year racing event gained popularity .. I believe Goodyear Racing began in the early 1960s ...
HERE IS SOME GOOD INFO ON RACING .. https://www.modelaviation.com/margaretjune
https://www.nclra.org/TorqueRoll/2017-10.pdf
The Real Plane . https://forums.realflight.com/index.php?resources/bill-falcks-rivets_ea.11259/