340ci AFB Carb: Approx Value ? Its Big, Its Rare

maybe a rare 68 4 speed with the special one year only cam
or a cross ram aka street tunnel ram (STR)tm from a destroked to 305 340 with the Kellogg 8 bolt crank and 4130 rods with the half inch bolts
or from a tunnel port head special order
thanks for the detailed tech info toolguy