I started with a GTT and replaced A,C,D,E,F,G, only kept B the transmission which can be purchased new from Amayama for $4500 delivered to my door. 6+ years ago It was better to buy a GTT as I did but with current GTT prices this is definitely a viable option now if you intend to modify the crap out of it as I have. I have had my GTT for 7 seven years now and it was good fun to drive though while I acquired all the parts I wanted to modify it over the first 4 years.