CRF450F/400ex hybrid...Questions

[BLRacing619]

I am goin to buy a 400ex real soon and tare it apart...i am goin to send the frame to atvfourplay..but besides the crf450 engine..wat do i need stock off the 400?

brakes and cables
wat kind of electrical do i use?...

[416exmx]

-250r style radiator
-YFZ450 throttle cable
-All wiring off the CRF
-CRF carb
-Carb boot adapter
-Radiator hoses
-Water pump cover relocater (american dream)
-Probably upper motor mounts from the CRF bike

Other than that, everything else can be aftermarket. 400ex geometrey of course.