Depends on the car. A 470 with TF240 heads in a rail would go pretty darn fast. In an A body, 10's should be fairly easy to accomplish. The previous owner of my Duster used to drive it to the track and run 10.90s on street tires thru the exhaust. That was with a full interior, all steel Duster. The engine was a stock stroke 400 with high compression pistons and Edelbrock heads from PRH. Those were good heads for the time but I don't think they were any better than a set of 240 heads.
That 400 made around 575 hp on the dyno, maybe made 525 in the car with fenderwell headers and a full exhaust. Car probably weighed 3400 lbs with driver.
A 470 with decent compression, good cam and 240 heads shouldn't have any trouble making 600+ hp. Should run mid to high 10's without any trouble in an A body as long as the car is half way set up.
