Stroker displacement will increase torque, but airflow through the engine makes power.
If it has stock heads, manifolds, mild cam, low compression, Small induction (carb/Intake/air filter) it will hurt power.
1/4 mile MPH gives an indication of power if the cars weight is known.
ET has alot to do with traction and gearing plus weight and horsepower.
Usually a stroker will have aluminum heads that flow 290+ cfm, 10:1+ compression, and high lift cams of 235+ duration @ 0.050", 1-7/8" or larger headers,, and 2.5" or larger exhaust system. A intake manifold that has flow that can keep up with the heads, and a carb larger than 750 cfm. Don't forget the air filter needs to handle the air flow too. Usually a 14"x3" or larger filter element.
Ignition curves usually are around 16 initial, 32-36 total mechanical.
When changing intakes/carbs the factory throttle linkage often is too short. Make sure the throttle opens all the way.
The throttle bracket and trans kickdown linkage usually needs to be modified too.
Then, don't forget the fuel system too. Usually 3/8" or larger tank pickup and fuel lines, and for 600 HP, a fuel pump with 60+ GPH (about 225+ LPH) flow capacity.