I don't think the 4.2 was available in the States, only 3.9 (4D34) and 4.9 (4M50). For the latter, peak torque is flat from 1800 - 2500 and peak HP is about 2700. At 3000 rpm, you are down significantly on both HP and TQ. Further, that is a very inefficient RPM, with regard to volumetric...