Twin tank wiring

Hi. I own a series 3 landy 88 which I've converted to twin tanks. The new tank is under the passenger seat. I've put in a brass military change over switch in the seat box & connected up all fuel pipes but I now need to get hold of a wiring diagram to complete the job so it reads on the fuel gauge. I'd be most grateful if anyone out there can provide me with a diagram please. Cheers tonypett.

the lightweights had this system so maybe these drawings may be around.

if ya really clever you could fit two gagues so when running ether ya get your mix right

Ok Guys thanks for the lead, I'll look into Lightweights & think about 2 gauges aswell.

look in the haynes the latest has twin tank wireing in it

Thanks Biggerlandy.