what would it take to make 450/500hp

so a nice soild cam but the 7500 is way high dont you think????this is the deal I would like to get this thing to run some low 7.0 in the 1/8 mile it has been some 7.70 with a 1.77 60' at 89.9mph before I put on the new ss springs alos I plan to set the pinion to 7or5 this time as well....I plan to do a new motor soon I just want this one to run the # for me at least.......