Pre-purchase guidance. Questions, questions LOL

I've come to a few conclusions about the way I am going with my G. New parts have arrived and a colour choice has been made.

New trim is ready to fit (lights, badges, mirrors, vents, reflectors, rubbers etc) and I have opted for Ford 'Morello' red which is a kind of black over cherry colour.

I've decided the Porsche BBS rims on my G have to go - they just don't do it for me :cry:

Here is a photoshopped version of what I hope to turn it into. Basically specced like a 'Pur' but based around a 280GE. I'd love the split rear door but don't know how big a job that might be.

Anyway after looking at wheels from ORC at stupid prices :roll: and the options available in Porsche 5x130 fitment I have decided to go with PCD adapters to fit Land Rover wheels.

As much as this goes against the grain (I would much prefer to fit something wide and german) it seems the most cost effective way to get wide rims on a G with a choice in style.

I'm looking at modulars 10" wide as I will be using it offroad and like the option to do so at will, rather than swapping wheels each time.

So here are the questions;

1)What's the best/largest and practical wheel/tyre size 15/16" and on a standard 280GE with the 25mm PCD adapters what should I expect in terms of performance and clearance issues? Is 15/16"x10J just silly?

I would like to go monster but appreciate that may be to the detriment of economy, on-road grip and body rubbing so concessions to body lift/springs and rolling radius would be better looked at before I buy. It will be a regularly used vehicle.

2) I'd love the split rear door but don't know how big a job that might be. Any ideas? I guess hinge location is the big issue.

3) How hard is it to fit 463 style rear lights? I need to replace the rear quarter panels anyway but what else is involved?

Any help appreciated.