Thanks for the comments guys appreciate it.
I have put a close up below of the filler cap, came of a bike, bought a tank from a scrap-yard and just cut it out to fit, think it was a Suzuki or Honda.
I am the guy the writes the cheques and is lucky enough to own the car when finished, but have no part in the skill involved in this project, that is all my mechanic and bodybuilder.
With my knowledge it is dangerous to change a light-bulb.
Not sure on ignition when we go to carbs, once again my mechanics area of expertise.
Thanks once again.