Derwent
The answer to you question about
www.fiftiesracing.org
It is a driver /owner run club who make no profits from races. It is just getting MSA approval as a Motor club and works with MGCC/ VSCC/ BDC and others to put on 50's GT races for those cars.
The aim is to put on races and speed opportunities for the owner/ drivers of these cars.
Hope that helps.
Mark