hey ppls, how are we?

we ahvent been on here for a while (for those who dont know or cant remember, ry is 11yrs old, we got him a 1200 ute to do up for his 1st car)

anyways, we have been given some r31 skyline stuff, a disc to disc diff, and a full complete front end, but we are unsure wat we can use, all the jargon bout wat fits dont make much sense to us (im into early celicas and rotaries, having 2 rs28's, r100 and 1300 wagon in the build) so any help is appreciated.

we know the diff will have to be shortened, but from wat i gather for the struts, they are too big but can be made fit if they are modded to coilovers?? in whic way are they too big??
we are building the ute on a budget just to get it on the road for ry to learn in, and then i guesss he will take over and do a turbo conversion (hence the upgraded diff, susp and brakes)

any help is appreciated

annette and krem (mom and stepdad)