Thanks again for the info man !
Tonight at 1 o'clock I ordered this stuff by RcMart:
-
Tamiya (#53988) Ball Diff Pulley (37T)
-Tamiya (#51287) TRF501X Diff Plate
-Tamiya (#51286) TRF501X Differential Joint
-Tamiya (#54134) Buggy Racing Wing Set (Lowered)
-*Yeah Racing (#YA-0167TC) 540 Motor Heat Sink (TC) (hopefully it will fit
)
-Tamiya (#53912) Led Light (Ø3 OR) (For my TT-01 Drifter
)
And I get the titanium diff balls (from a Schumacher touring car chassis) from a friend of me, he found them
The places where I drive, is the 'Track' at a local RC shop here, it's a little loose dirt track (with 'hard' dirt underneath the 'loose cover').
I just drove 1 time with my durga at there, but next year I wanted to drive more often (ones a month or so).
And the other place I drive is a very big parking lot, where I just do some speedruns and chase TT-01's or M03's of my friends, not really 'racing' just going straight (it's mostly 1 time a month too 
)
I just liked the wings, and my wing is cracked and these 2 are cheaper than the 'stock' DB-01 wing
So why not
After I entered all my settings in the GearChart machine, it says I'm running an 8.13 gearing (91T spur and 23T pinion)
The Novak site says me to run 8,5 (with an on-road car) or 11 (with an 4wd offroad car)
What should I do right now ? 
About the Body, I saw RcModel.HK, they sell them, but they are out of stock, I will mail them, if I have an answer I will place it right here 
Again, BIG thanks dude !