The first thing is to disassemble the nitro engine, brakes, exhaust pipe, throttle servo and nitro tank:
The motor mounting adapter can be bought from ebay or aliexpress. It's very cheap.
Adjustment slots:
This motor (Graupner 600, 550 size) can operate at 2S or 3S Lipo:
I put the ESC, receiver and battery. The battery is fastened with "velcro":
I also changed the body por una del coche "Citroen ZX rally" and adapted the mounting posts with aluminum profiles.
This is the new car:
The car in action (video):
The complete process is here (in spanish lang.): http://reparar-cochesrc.blogspot.com/2017/04/reparar-diferencial-de-master-vh-x5.html