Whos running over 700whp on an 8.75?

I probably had under a grand in one of my nines. A narrowed housing was in the car as a roller when I bought it, got a new spool,and used gears and nodular case from a good friend who owned a one man rear-end shop. He specialized in nine inch fords, he bled Ford blue. New 33 spline strange axles, and JFZ disc brakes. I doubt I could build it again for under two grand today.