@Adnan, about the JGTC kit, just do what Tiago did with his s13 mod, this way you can separate it like Chassis is sills+roof, then you add
Firewall and floor until rear seats->enginebay until shock towers->front part of enginebay->radiator support
Firewall and floor until rear seats->rear part of floor
this way you can have a tubeframe chassis as well, cut enginebay with tube frame for the front, cut rear floor with rear tube frame, and add different enginebays, like the JGTC enginebay
