Well here' the math:
ET from HP (1/4 mile) = (WEIGHT / HP)^.333 * 5.825
(note the little ^ symbol indicate an exponet i.e you need to take the value to that power)
Keep in mind that this is rear wheel HP not flywheel HP as measured on a Dyno. if your running a torque converter you will lose ~ 8-10%
So if you calculate (3300# /563HP)^.333 X 5.825= 10.50ET but thats rear wheel HP
so you need another 8% to at the flywheel or 563(HP) x 1.08 =~608HP to run 10.50
10.90 calcs out to 544HP but that would leave you no room to account for bad air,bad tracks etc.
Try this web site for more racer math
www.freewebs.com/soslo/formulas.htm#hp_from_et
Hope this helps!