Yeah the eight 3.0 just came out back around the first of the year I think it was...theres not a whole lot of difference from 2.0 to 3.0....if you tried going from 1.0 to 3.0 then youd probably double the differences...Heres a little list I found of the main differences between 2.0 and 3.0.
arms are "Different" front and rear....
towers are different,so "geometry" for camber links are a little different.
Caster Blacks and steering knuckles "Are Different"
shocks are very different, big bore now..and shock "Lenghts are different"
old front 8T 2.0 shafts are little "Shorter" than new ones.....rear I haven't checked?
and gearing for "Diffs" are different! now able to use 12t Pinions,but gear ratio
is still about the same....
Oh, and the Chassis is Milled a little differently, for "flexible tuning"