Im in the same club of madness in a minor!

although I am much earlier in proceedings

Again none of this is critisism, meerly observations

I noticed that you have modded the bulkhead, have you kept the bit with the chassis number stamped in? There are a pleathora of new rules and regs at the DVLA regarding whats allowed and whats not, I would recomend having a look at the new rules as I understand that bulkhead modifications can he a huge NO NO
In this pic:
the bumper irons seem to be outside the engine bay, have you double skinned the inner arches/wings?
(and nice broom storage lol)
Id never thought about putting the axle stands there, looks like you would get a lot more working space. hows that working out?
You mentioned a slimmer front cross member, could you snap a pic of that as its something im in the process of meddling with at the moment.
I have recently posted about fuel systems so your questions come at a good time!
A minor engine only needs a trickle of fuel to run so the stock tank and pump are sufficient. Once a thirsty lump goes in there things change a bit. Fuel injected engines tend to need a high pressure feed and a return to the tank.
I have found a product that will give everything required and should be pretty simple and comparatively low cost.
CBS ltd to a fuel swirl pump. The way im thinking of doing it is to fit one of these somewhere and connect it as follows:
It needs a pump to feed at low pressure from the tank (planning on something similar to a minor pump but very close to the tank)
it has an output to feed into a high pressure injection pump
it will need a return line to come back from the injector rail on the engine.
it also has a return line to the tank.
This will probably lessen the effects of fuel surge from the original tank. I will probably use a steed or ally T piece for the return and fit this in line with the fuel filler pipe.
The way this will work if the low pressure pump will run all the time to keep the swirl pot topped up, this will then give an uninterrupted supply to the high pressure pump, the high pressure pump will run continuously and any fuel not used comes back down the return line and into the swirl tank. Whenever supply exceeds demand the excess will exit the swirl pot and end up back in the fuel tank.
This may change though lol
On your ignition module I would find the earth by checking with a multi meter (on resistance setting) if any of the wires are internally connected to the body of the unit. this will be the earth and hopefully should give you a starting point.
I noticed that you have wooden panels in the woodwork. I don't suppose you might have been inspired by a car that used to do some shows and had tongue and groove instead of the ally panels?

Ta Da!!

good to see another Trav coming together!