108" WB A-body weight?

Hello, I'm wondering if anyone can help me with vehicle weights.
I am currently building an Australian A-body as a bracket car, the platform and sheet metal
are virtually identical to the US built cars only the steering wheel is over the other side.

This thing is pretty much a Dart pick-up, its gutted, no heater or wipers, only the shell of the dash,
no glove box door or ash tray, no factory instruments.
Wiring is only start and charge, fan, water pump, fuel pump, no lights-turn signals.
Fixed lexan windows all round, no window cranks, one race seat.
The body has frame connectors, tork boxes, steel hood and fenders, no bumpers, no cage yet.

Engine is an 906 head 440, 727 behind it 8 3/4 out the back.
Thinking I need an idea of weight to put a baseline gear and tire under the car.

I assume it will weigh similar to a Duster or Dart sport, if anyone can help with a little info,
It would be very helpful, Thanks.