My pump gas 470 made more than 700 hp with out of the box TF240 heads so I'd think you could do the same if you picked the same parts. Solid roller cam, ported intake, good carb (950 HP is probably too small for 700 hp but should be okay for 600), good headers, good ignition.
https://www.motortrend.com/how-to/t...etors-440-stroker-search-ultimate-power/600 hp with 3600 lbs is enough to go lower 10's at 130. 700 hp at 3600 lbs would be enough to push you into the high 9's. That only applies if the chassis really good and of course you need the correct converter, gears, tires, etc. I don't think there would be any problem making 650+ with your short block and TF240 heads but you need to pick the correct cam, need good rocker arms and I'd highly recommend porting the intake. Once you have 650 hp you'll have to figure out how to get the car to hook and launch.
