How much "true" HP is needed to push 3800 lbs to 9.90s?

Yeah, I know it takes a sorted chassis, but I do believe mine is finally dang close.

Looking for real world experience....

Thanks


72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.