Searching around for an answer to a 5 lug question i came across this and thought i would add what i did to convert my front to five lug big brake.
if you are considering sectioning your struts here is some info in a cheap ( in my case free) brake and 5 lug upgrade.
http://forums.hybridz.org/showthread.php?t=121032
i basically section in the bottom half of a z31 from strut to the top end of my s30 coil over strut using VW inserts.
You have to have adjustable control arms and tc rods as the caster is different on the z31. i was able to tune it out with AZC control arms, tc rods and camber plates.
I had to use the z31 steering knuckle which also required the steering rack arms to be made longer. anyways just thought i would add my input. and as mentioned above this does move the wheel out 3/4 to an inch so a different offset is required. Also if you z32 or gtr calipers laying around it is a bolt on upgrade.