I replace my old rectangular regulator on my Westy propane system with a
newer "round" model.

To catch you up, I have a failure of my propane system while traveling with
my grandson to Washington DC. We had to divert to a hotel after the
complete failure of our heat, fridge and stove during the blizzard. When I
got back home I replaced the filler, but then I discovered a leak in the
regulator.

I was able to cut and reflare the lines to fit on the car. Almost
everything is new now and no leaks. The stock stone guard fit so closely
that I had to the relieve the plate steel guard with a drilled hole to
allow the plate to fit without interference from a test port plug at the
bottom of the regulator. It all worked out and doesn't need a special
extension for the filling nozzle.

Jim