Performance upgrade options for V10

This is pretty much a "Chip" thread, but Tire Pressures worked into the discussion. That 65-Front and 80-Rear is nothing but the pressures to be used if a pre-2008 E-Series with 4600-lb front axle is loaded to front axle max. Most C's, especially the shorter ones, run way less than 4600-front. An actual weight (truck scale) and adjustment of tire pressure to that weight, makes a big difference in handling. Rear tires, not so much, but handling (and tracking!) are very sensitive to front tire pressure.