I may be wrong about this...but as I used to be in the 240SX/Silvia scene...it was known that the 6-speeds are actually WEAKER, due to skinnier gears to fit in the same space as a 5-speed. So, for those that are looking for higher horsepower/drifting applications, it is preferrable to use a 5-speed instead.Ive been lookin in to this myself. I wanted to do it for extra durability, planning on 300+hp.
You're right!!! =D>Did a little research, all you need is trans, plate, and rewire reverse switch. Starter can be reused with only 2 bolts. Rear is not required but have to pay attention to gearing. You can swap speedo gear for more accurate speedo. But any driveshaft, clutch and flywheel will work, but clutch and flywheel will have to match each other.