Long Range Petrol tank access issue

[dom14]

Hey Guys,

I'm in the process of pulling out the 70 litre long range custom tank in my GQ RB30 Patrol.
Tank was installed quite a long time ago by the looks of it. (twenty years or more I reckon).

I'm pulling it out to diagnose a possible loose power connection to the petrol pump or possible intermittent pump issue.
I discovered it is a real PITA job to remove this custom long range tank as it's a tight fit.
I'm wondering,

1)Does it make sense to make a new pump access point from the floor above for future accesss ?
By the looks of it, the petrol pump is just under the right hand side rear seat.
So, I'll be looking at removing the rear seat, carpet and cutting a hole on the floor and make the proper removable plate to cover the hole.
Is it worth it or is it an overkill?

2)Is the petrol pump the same as the original factory one? Do they simply use the factory petrol pump with the custom made Long rank tank? Do I need to pull the petrol pump out of the tank to find that out?

3)Are there any external pumps from other vehicles that i can adapt for this RB30 Patrol?

Long Range Automotive(LRA) were the people who installed the tank.

Thanx in advance for any advice.