is the 33 a better car than the 32 or is it the other way around?
almost identical barring the 32 is a fair bit lighter, and the 33 looks totally different.

what years were they produced?
32 is late 89 till 94 i think. 33 is 94 till i dunno, 98 i think?

will it be more difficult to source bits for an imported version (assuming they wern't sold her originally)?
nissan can get you ALL the bits from the dealer no problem, and quickly, and some of the tuners can get it even faster and even quicker. even dead rare parts.

what are the main things to look for when viewing?
if they are fucked usual stuff really, plenty of buying guides on GTR forum, go looksie

how reliabile will it be with 400 horses?
you mean "stage1" (ie 360-380bhp that most people call 400) or real 400. if done well, both would be relaiable as standard. and boring and slow IMO

what are the consumables like cost wise for general running about if you don't spend on fancy brakes and engine bits?
fuel is a lot of money these days

what goes wrong that is costly to fix?
big end bearings go, turbos shit out their ceramic exhaust wheels, ignition coils die, etc. and tho all other bits are mega strong, if anything does break, its a lot of cash

why sholdn't i take it to ea?
because they are absolute jokers

who is the best place to take it to for getting looked at?
if london way, then GarageD in Watford, or RK Tuning, in, somewhere else nearby

who is the best place local to west london to go and get it looked at?
see above

what should work that peole will say does work without having the ability to check if it does or not?
eh

any lights that need to be on when the ignition is on that shoudl go out when the cars up and running?
i cant remember, but oil and battery of course it has a front torque gauge tho that does things and stuff. again, check buying guides on GTR forum

do they need to run on a specific fuel?
super unleaded minimum, but IMO it needs to be checked even thats safe as jap fuel is good, esp if the cars been remapped at some point in japan

anything else you can think of that will be relevant?
dont do it seriously tho, they ace cars that sound amazing, but i just not a huge fan of lightly modded ones, better cars out there IMO for the money.
oh and the 4 wheel steering sucks, may go wrong, and sucks. dead easy to lock and/or remove anyhow, solving all issues cheaply