If it ran at 6.65 pounds per cube, it would weigh right at 2100 pounds with a 314" engine. At 160 mph the Moroso calculator puts it at 660 hp and about 685 for an E.T. of 8.41. Still pretty impressive number for a mill that small IMHO.
I can see 700 hp for those heads. I don't believe 900 hp from that engine, and 800 hp would be very iffy with those parts, but those heads look like they would make 700 hp. I've seen a fair number of 700 hp SBC circle track engines and that is what the ports look like on typical 15 degree heads. If the car raced at 2100 lbs then it all makes more sense.
