How much power could this combo hold up to?

[MaxHarvard]

Ok folks, i've now completely upgraded my rear end... nearly 100%.

its a 8.2" GM 10 bolt with an Eaton Posi. 3.73 Richmond Gears and a brand new set of Moser axles.

Any idea what that combo could hold on a consistant basis? I've i go bigger with the motor, what might be the limit for HP? I'm only at 450 at the crank now.