only one way to find out josh...

i thought you already knew about them... i had one in the front of my original hyper 7 and it was the nuts :) so so so much cleaner steering and power through corners :) so yea... their old ;)

as for running it in the centre, it wouldn't increase wheelies anymore than having a transmission would... think about it... with a locked centre diff, all the power is going to the front and back... when the front lifts up, the front wheels gyroscopic action takes over, pushing the wheelie up... with a torsin this wouldnt happen... or shouldnt happen...

the crop up from time to time or forums like maxbashing or oople josh... if you stick up a wanted add you may be able to get one at a good second hand price... try it out and if you hate it, sell it at the same price :)

if the rc8t has standard size diffs (Hyper 7, savage, older losi, old kyosho) then it will fit... if it has one of the new smaller ones it wont :(

And josh... as for running front and rear you would need to use non bullet proof gears, which shouldnt be a problem with a well shimmed GH bulk :)