There is no way you are running under 9.90s with anything close to stock flowing heads/intake/exhaust. I'm talking near stock compression and head configs. I currently have a very nice running 440 with a small upgrade in cam (but still hydraulic with stock 452s on just a bench port job.) Old Edelbrock Performer and Holley 750 in a 3600lb GTX. I would be happy with mid 13s.
That car is not close to numbers matching. Thus ideal for a performance build. But just can't get myself to pull a very decent running engine and 4 speed setup just for more performance bling. Lol. So it's my putt it up to very local events and watering holes car. Solid #3 driver quality condition car.
Sometimes it's love the one you're with. (I think that's an old song?)