Hi Tatsushige,
The kit uses most of the required the parts from a BA/BF Falcon. All the mounting points are in the chassis to accept the Falcon parts which includes suspension, complete drive train, dash, wiring harness.
Anything is possible with kitcars so modifing the chassis to accept local parts would be a challenge. The 5 ltr V8 toyota motor would be a nice engine to use.
DRB Sportcars builds these kits(
www.drbsportscars.com ). Send them a email and tell them what you would like do to. There is a guy on the Gold Coast that gets wrecked falcons and sells them even in a stripped down version for the 540 (
http://clubcobra.com/forums/showthread.php?t=94669 ).
What are the rules for kitcars in Japan like(emissions, design rules etc)
Warren