shock weight, nitro to electric

[steveo]

i bought a kyosho mp777 off e-bay did the conversion looking to do some racing with it but with the heavier equipment where do i start or use what is in the shock now and see how it performs, its be a long time since i raced and and i have read to compensate for the weight use thicker weight oil but by how much this does me know good since i dont know what i have but is there a ratio

also with higher power of the BL does this thicker weight oil apply to the diffs as well