To answer what the offset questions

Disc face to Disc face is approx 1390mm

Heres some more pics. Here you can see the Toe adjustor machined down on the outside(S13 end).
Sorry havent had a chance to take wheels off pics, Its still raining plus i have a Supra in my shed thats getting worked on atm.

I also have good travel in the strut, and the ISC's have 32points of dampening adjustment.
Normally ISC's are used in drift cars, but atm they sell them with what every spring rate your after aslong as its 2,4,6,8,10,12,14kgs for no added charge.

Please note i have no business interest in ISC, just found there products to be very good for bang for buck.

Coilover link

Height in the foot and pre load on the strut nuts.
In saying that, if you adjust the pre load height you can change height slightly due to the spring tension increse.

not sure as i dont have a 13"rim to try, but 14" yes.
I am sure the standard 12's definetely dont.

S15 and S14 wheels look nice on 1200's gives them a modern tounch if you plan on running a 5 stud diff.

Research wise, 11years ago i had my 1200 and a CA18 frontcut side by side, and from there it was ####s and giggles at how easy it is.
back then i had Teins but my budget this time didnt stretch that far.
Bolt spacing im not sure atm but will measure shortly, you can mount the R32/33 4 spot callipers to these and run the the corresponding disc' drilled out to 4 stud as i did in my ute but you need to run 16"wheels for them, (or run the 5 stud skyline hubs instead of drilling out but then you need to change your wheels unless you plan to run a falcon diff)
Everything clears nicely, one day im going to change to braided brake lines but need more $$$. i want to change out the stumpy gearbox and ute diff to a CA18det gearbox and R31diff before hand.

I will have wheel off pics shortly. I had them but they got wiped off my camera.

You could possibly be able to roll your standard guards and have them fit . With about -3.5degrees camber it should be no probs.
Bare in ind im running 15x7" wheels with 27mm offset, a set of front wheel drive wheels will bring them in to the standard guards, as you can see i still have a little bit of room between the strut and wheel.
Time wise now i could easily do it in a day.
Machining approw 3 hours, and the rest is bolt up...Literally...then alignment
Camber adjsutment is great with the gear i used, it can be adjusted to about 4degrees at the hub-lower strut mounts and and about another 3-4 on the strut tops.

I done this about 11years ago to my 1200Ute, but sold it to an Asain guy on the gold coast but here ended up doing a 1/2chassis dag car out of it.

Items used, ISC coilovers with 4kg springs.
S13 LCA's with the follow modyfied to fit.
Very easiliy done plus it gives alot of adjustment possibilities.

Caster- S13 Radius rods are cut, drilled and tapped then added high tensile threaded rod to give adjusted caster.

LCA mounting- 1200 cross member is drilled out to from memory 14mm at the front then 12 mm at the rear to suit the S13 LCA's.

Chambers tops are used from the ISC coilovers with the standard strut top holes drillled out to 8mm.

Toe adjustment- I used the 1200 rods but the are machined down on the outer to S13 (12mm fine from memory). I used a 1200 left hand side inner tied rod end on the right inner so the toe adjustment can still be used as the thread on the rods can still adjust as normal.

Brakes are RDA slotted rotors and Bendix pads, the S13 brake lines will screw straight up to the 1200 brakes lines.

Sway bar- the LCA end is drilled out for a new mount position similar to the 1200 point.

What it cost, $770del for ISC coil overs, $150 for the S13 LCA's and hubs, $180 for the Slotted rotors and pads. I done the machining myself at home but $150 should pull that end up.
So for around $1250, personally i think its a better option over other strut/brake upgrades. Offset will be wider than standard and Stanza, but still fit inside the flares im using with 1.5degrees chamber.

I will add more pics when i have the wheels off next and it stops raining.
Im now looking for Castillated nuts for the S13 ball joints Nissan dont have them unless you buy the complete LCA set up at $800.

Note.... these are my veiws and opions only and i will not be accountable for anyone attempting this option.

Thanks for your help.
Time to pull her apart.