Bit of help please

[gerbil]

Hi I ve just got a x2sc
I'm just wondering if a lot of the macnum bits fit I know the hardware diff steering assemble all the same but are the wishbones the same

Secondly I'll be running my brothers elects from his b4 it's a speed passion 6.5 so my question is what pinion should I gear it on
I used to race stadium trucks and used to run a 22 t around southport
Any pointers would be great
Ps its the large spur gear on the sc
Thanks in advance