how do the numbers match when the engine is not stock?
Worth about $30k. Try Gas Monkey garage, maybe you will get $40k if you can entertain them and sign the waiver to be on the show.
Simply means that the car Vin number matches the same Vin number that Ford stamped the block with,hence numbers matching.
And ,if you even had a clue as to the value of Boss 429's even in the worst condition they bring over 6 figures all the time.
Do a little research before you swallow your foot.