Advice needed - Spark plugs, leads and carbs, 914-6 Options

[Dobbsy]

Hello,
I have a few questions that I need help on.
I bought my 6 back in August and it was running rough. I am now replacing the fuel lines with stainless steel and new rubber hoses. I will also be changing the plugs, leads, dizzy cap and rotor arm so everything is new.
The PO has also put a fuel regulator on which I am not sure if that should be there. Is seems a good idea so I plan on keeping it but adding a gauge to see the pressure. Is there a standard for fuel pressure gauges? Any recommendations.

I have not removed the fuel pump yet how do I identify it is correct, do the ones for carbs look the same as injection. I have been caught out by this before.

I have bought an ultrasonic cleaner for when I rebuild the carbs, does anyone know of any good sources / tutorials for this.

I am planning on getting Magnecor leads but the sales assistant asked me to check the coil lead length, the one in the car is 16.5" and the one in their catalogue lists it as 9.5”. as the one in the car looks longer than it should do, I believe the correct length should be 9.5”. Is this correct?

Spark plugs, what do people recommend, either sticking with the standard rating plug or selecting a colder rating, the car will only be used on the road.

When I took the fuel tank out and removed the fittings from the bottom there was not a gauze filter, should the be one on a 1970 car. What is the method of choice for cleaning the tank out, there is a bit of light rust inside.