Glad to hear I have inspired you mate and thanks for the kind words. Motor is almost finished so I will try and put newer pics up soon, been flat out the last few wks with uni and work
In answer to your questions:
I choose coils partly for simplicity and availability but really at the end of the day coils are far better for ride, articulation and cost.
Whilst it is a stock motor in terms of the engine and internals it will certainly be tweaked more than it already is with fuel pump , high flowed turbo and retune. The original mu would by far have been fine for that sort of power, no question there.
My aim was a more aggressive looking mu, something unique and to do away with god awful ifs cv shafts! Lol
I chose patrol for a couple of reasons, mainly that it is really the only competitive solid axle swb around. That and the bulletproof reliability, cheapness of parts and availability of a donor. There is a very similar thread on here by another bloke who did the same sort of thing which inspired me and I knew with reasonable certainty that the chassis would fit ok.
As for tyres I'm running 33's as pictured from my mu before but I will be looking at 35's to complete it as the standard tyres. Probably wont go bigger because it clashes with a lot of comp regulations and its really not necessary for a dual locked winch style truck, I'll just end up braking something and reliability is what I'm trying to maintain ( hence keeping the Isuzu engine).
Hope that answered your questions mate.
Will try and update soon.