Stock stroke?
Headwork?
If it's still stock capacity I think you would be better off with 9's and making a slightly lower figure. It's all good to say you want 'X' power, but when you get belted off the line by a much lower powered car you wont be happy!
2.8 to 3.0 with 5's yes
2.6... Not so much...
Having said that it does depend on what you want from the car.