What i what to do is Rig a car alarm or equivalent as the ignition, so the arming/dissarming is used to turn the fuel pump and ignition on and the engine start is used to crank it over.All operated from the key ring and Yes there will be some master kill switches in there

Something like this (excuse the diagram, more than a little rusty) with a signal coming out of the alarm to hold the ign on.
Does anyone know whether this is at all possible?
Any recommendations as what to buy?