I looked it over as well and in detail and for me and my sc400 it is too much work to switch tranny's from an automatic to let's say the V160 or some other strong manual tranny, fabricating a clutch sytem is too much work, etc.... I am working on finding ways to beef up the original stock tranny in my sc400. I hear it can be done and I am also working on how to achieve more timely shifts as well, I believe a really good stand alone ECU will help with the timely shifts to create peak performance. I am trying a different route then the norm, I will find out more info on what can actually be done to really strengthen the stock auto tranny's. Larger valves etc... I know you are working on a totally different beast, but I have a simular situation to yours.