A70 is not the only insider source on this forum, i've been chatting to a few others as well that have had reputable info prior to it being revealed too :)
- Lexan windows,
- buckets
- minimal carpet
+ bigger calipers
+ full cage
Usually a full cage will add about 80kg, so I'm assuming 1400kg ish will be close.
A JZA80 stripped and caged to a similar amount usually ends up back at factory weight +/- 15kg