You are bidding on a Holley Model 4160 four-barrel carburetor, stamped P/N# 80453, date code 0689, rated at 600CFM.  This model is a squarebore emissions design with vacuum secondaries, externally adjustable floats, Ford transmission kickdown lever, and an electric choke.  It is used, nothing is seized, the choke cap is broken and will need to be replaced.  Looks great but I didn't hear this one run; sold for parts or professional rebuild; this is a great item for your project or for someone who works with this model.  Shipping is FREE for USA 48 states ONLY.