Quoting car_guy:
How many people on here have done the rebuild themselves, and how difficult would you say it is? I read the Vfaq and it doesn't seem that hard. Don't really need any special tools, just a press. Also, where is the best place to get all the upgraded parts you guys are talking about, double synchro 2nd, 4 spider gear upgrade, evo 3 gear set (or at least 5th)?
You also need to shim the gear stacks, using feeler gauges, solder method, etc. As far as gears and such, JNZ Tuning has everything you need except for the Evo3 stuff. It's all been discontinued, and you will definitely have to do some digging for used stuff, or absolute trenching for NOS (new original stock) last I checked.
Also, Prove_it also hit a nail on the head. You will wear out synchros if the clutch isn't disengaging properly. And torque rating will come into play as well. I love my twin, but it's not for everyone. I know a lot of guy that still get by with a street or 6-puck disk, and a heavy single plate up to 550-600whp. Just need to properly set it up. Also as a side note, I recommend against a sprung hub, when using a puck style clutch. The aggressive engagement tends to wear the springs and the center hub out fairly quickly.