Yes, I've just realised why it's so long.
It was to scale but I had included the cab section in the measurments. Now I have added the cab to the front, It is well too long.
Oh- And yes the windows are way to big too.
EDIT: I've decided rather than trying to change what has already been done to look as correct as possible (which will never look perfect), I have started work on the body shell all again, (And I've added the interior cab walls and started on the front lights (not visible on the pic bellow)
!!IMAGE REMOVED- I'll post later tonight with progress!!
Regards,
Phil