whats the difference between a t2 lsd and a n/a lsd
 

i have some sort of clutch type lsd in my car. im trying to put it in my 00 miata... and i have an 88 fc gxl that im getting rid of, but im taking out the clutch lsd first and putting in an s5 open since the lsd is going into my miata... but when i try and put an s5 open (compete diff, housing and all) in it, it doesnt fit.. i need to know if i have an n/a lsd or a t2 lsd, but what do i need to look out for to tell what i have? thanks.

http://www.rotaryresurrection.com/2n...in_differ.html
http://www.16paws.com/rx7/index.html

Also, the turbo halfshaft bolt pattern is about 91mm, while the NA halfshaft bolt pattern is about 88mm.

so heres what i got. measuring center stud to center stud (diagonally) on my lsd and s5 open


unknown clutch LSD: 115mm
s5 open: 111-112mm


that first websirte would be perfect if it had measurements. care to help tell me if ive got an n/a lsd or a t2?

from the first link that evil posted... soooo does this mean i have a t2 lsd?

if so.... dammit. i need a n/a lsd. t2s are slightly larger and do not fit in the miata's housing without modification.
on another note, if i do have a t2 rear end. what do they usually go for? (complete diff w/ stub shafts, half shafts, and drive shaft.)