I am currently dynoing a set of twin turbo 358 ci big blocks that we redid with new turbos, electronics, etc. they ran 1280 hp and almost 1100 pounds of torque at 20 psi. because of the small cubes we spin them 7600 and they carried the 1000 pounds of torque from 4800 to 6800 and held the hp from without ever really falling off. the boost is electronic and can be changed with the push of a button. should be interesting as they are going in a 30 ft cat.