The difference in spool between a GT3076 and the GT3040 isn't much at all, about 100-200rpm different.
I am guessing you have the 0.63 rear?? This is going to bring the turbo on reasonably early but will limit the top end power, 290rwkw might be tight with the small rear on pump. 0.82 rear and/or E85 you will get there easily.