Does anyone have the full dimension on the 400ex and or 250x chassis in stock form

what I need is full length, width, engine compartment dimensions and width of the frame were the engine and swingarm attach together (swing arm pivot area)

I am looking at dropping in a RC-51 motor but I am concerned about the rear head on the big V-Twin, maybe have to go with an inline 4 like others have done.

I really want the 400EX or even a Raptor chassis but there is a guy selling a 250x rolling chassis - It looks a bit smaller like the 300ex but I can't seem to find a 400 ex without a motor.

Thanks to anyone that can help

 

go to cal atv for a frame. idot now about the specs