Looking at an E body 70 challenger

Nice Challenger. Check the block vin if its correct for 20k you should already have it on your trailer. Is it an original California car or was the Chrome exhaust extensions an option?
Its a non RT car with a 383 so no dual valance i thought with non RT model? or could be CA car.
where do i find engine vin?
found casting number on side of block codes to 70 383 carb also 4732 AVS