got a eight-t roller and now?

[timaneli]

hello.

yesterday i got myself a used eight-t roller in good shape.
and now i will convert it with this kit:

http://global.ebay.com/HobbyPro_Brus...219504309/item

and i will use this combo:

http://www.swanghobby.com/hobbywing-...-s-pr-723.html

i will try it at 4s lipo and 2s2p a123 cells, so what advises for me since it´s my first 1/8 truggy conversion.

i check the car and it have amazing construction and space to convert.
and for now i have some doubts about pinion/and spur gear to use and viscosity of the diff´s mainly ther center one...
should i use the smart diff too?

regards