I can kind of see the reason for the pricing. Look at the heads. Obviously a 402 CI motor. The kind of heads that it takes to create optimum flow for an engine like that are expensive. See those little AFR's on there. My guess is 205's or 225's. That is almost $2,000 for just the heads alone. It's a justifiable price. Not to say I'd pay that.
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"Gripping the wheel his knuckles went white with desire, the wheels of his mustang exploding on the highway like a slug from a .45. True death. 400 horsepower of maximum performance piercing the night, this is Black Sunshine"