Fuel tank relocation to rear? Options

[Mendivil26]

Story time:
Last time I parked my '75 2.0 to restore the front suspension, it was running relatively fine.
As usual, a simple task estimated to take a few weeks turned into months, due to lack of time & budget. A few months go by and I notice the interior is flooded in gas, thankfully the car had no carpets and nothing caught fire.

I did my research and diagnosed the leak came from the plastic fuel lines that go through the tunnel; simple enough, I'll replace them with SS lines.
I go ahead and clear the interior of any remaining fuel; drain the rest of the gas tank, only to notice the horrible condition it's in; chunks of rust coming out of it.
Now I not only have to replace the fuel lines but I also have to either restore the tank or replace it (dansk tank $230 plus SS line $170).

My goal with this car is to turn it into a baja inspired 914; and since I don't really care about "originality", I wondered: what if I replaced it with a universal fuel tank used by dune buggies/prerunners (Jaz, RCI, etc) and placed it in the rear trunk?
They seem to be easy to find secondhand and not so expensive.

I started looking into it and noticed obviously 914 racecars have "fuel cells" but they all kept them in the front.

This is a list of pros & cons I came up with, and since it hasn't been done before I assume that it'll be a very unpopular inion, so please go ahead and talk me out of it since I'm biased and can only think of reasons to actually do it.

Pros:
No fuel lines running through tunnel = simpler system & shorter lines.
Less or just as expensive for a unique or "custom" look, since I've never seen it done before.
Shifts weight to the rear, which is better for my application

Cons:
Safety? Rear suspension is being reinforced so the tank could be protected by the cage I'll build around it in case of a rear end accident, but the fact that it's closer to the engine and hot temperatures might be a bigger issue.

Anything else I might not be considering?
Has someone seen it done before?
If so, please share pictures/info.

Picture of how it sits right now with UTV tires, for reference:


Picture of what I'm thinking of maybe doing:

[Front yard mechanic]

open up the hood and put a aluminum cylinder tank in the original spot and show case your baha idea plus ,fill up fast! (IMG:style_emoticons/default/smoke.gif)