Wow, so much good info so quickly, Thanks chaps.
In answer to the various questions
The tank is mounted behind the central bulkhead, across the chassis.
The regulator looks like it is sitting on it's side.
Carbs have been topped up with oil.
The lpg system has a mixer between each carb and the manifold.
I don't think there is a lambda sensor, it is an Italian set up, not sure how it works!!
From cold it starts second turn with full choke, choke in immediately, then have to change to LPG pretty soon.
Starting from warm on lpg is fine, seems to start OK on petrol if the throttle is floored!!
I like the idea of the amplifier, but also am attracted to megajolt (a lot! )
But I think my first port of call will be ignition timing for petrol, sort the stuff I understand first.
LPG is not so important as it is not a daily driver.
But when it runs well it is fun, first Landy I have had that gives me the option of overtaking people!!