What could this worth? 340 block and X head

The motor was cast in 69 but was used in a 70 car.Check the vin number stamped on the passenger side just rearward of the motor mount and just above the oil pan.The car year will be the first number ,then the plant the car was built at then the cars last six id numbers.

BTW I think I reconize your avatar and user name over on the chargerforums.