Fuel return valve

Greetings,

My "well I bought it for parts but I guess a little bit of work wouldn't be a waste of money" '71 now looks sufficiently well-dressed not to concern the neighbours, other for the fact that it takes a minute of turning it over b4 it comes to life if its been sitting for a few days.

Various experiments have led me to the concusion that the fuel is draining from the bowls when it sits overnight.

I'm assuming there should be some sort of one-way valve around the place preveting the good stuff from driaing away, but aren't sure where to start. Anyone have any suggestionswhre to look or alternative hypotheses?

Cheers

Damian Percy

'71 240 in Adelaide, South Australia

"No sweetheart, overspray won't reach the washing line...."