Yea everythings an "HP" nowadays. The only way it's worth that price is if a person saw it run strong before pulling it. God only knows what it looks like inside. 400 clams tops and that's with either 906 or 915 heads.
But IF it has 915 heads they won't be the big exhaust valve...unless somebody swapped um out cause all they came on was the 440 in 1967 only. Kinda long shot there. lol