[Mgs] 78 MGB Brake fluid change

[Steve Gorr]

I will be replacing the brake hoses with braided steel/Teflon units sometime
this winter and Santa left a large bottle of silicon fluid. So I was wondering
if I should flush the lines with something before introducing the silicon
stuff. The existing brake fluid hasn't been flushed under my ownership other
than bleeding and topping off after rear wheel cylinders were changed 2 years
ago.