I have a 78B which is pretty much stock. On the metal pedal box located
between the brake master cylinder and clutch master cylinder, there is
what I think is a vacuum switch. There are two wires coming from the
bottom and two places for hoses to attach --- only there aren't any
hoses there. I can't find any reference to this in my Haynes manual or
the Moss/VB catalogs. What is supposed to be connected and what does
this switch do?
78 MGB (in more pieces than I would like with spring