The engine turns a moderate 2350-2400 rpm at 70 with the 4.10 axle. I don't think you will notice any drop in performance except when towing. Limited slip axle is a must, but with it, you would be surprised where you can go with a 4X2 'Burb as long as it isn't deep mud or deep snow. Brakes are huge. Front rotors are ventilated 12.8 inch discs in front with dual piston calipers and 13 inch discs in the rear.
ABS is standard.
In several simulated panic stops from 40 mph, the big 'Burb came to a halt in about 50 feet. Inside are some great seats starting with the front. The leather buckets are some of the best in the business and they equal or exceed the Blue Oval in comfort and quality. Support is found in all the right places. They are made for long, fatigue free periods in the saddle.