I just purchased new E rated tires for my 2004 Dodge Ram 2500 2WD with 17 in rims. The tire placard says that I should have 50 psi front and 70 psi rear. These are the towing and loaded pressures, but there are no pressures given for when the truck is unloaded/not towing.

I searched the internet and on some of the Ram forums several said they ran 65 psi front and 55 psi rear or 60/50 when unloaded/not towing. Some ran 40-45 rear and 5-15 psi higher for the front. All these examples were on newer Rams with larger tires and rims. Since the 50 psi is my max pressure for the front, I don't feel comfortable running higher than 50 there. Just looking for some advise. I would like to improve the ride unloaded without damaging the tires. Any advise would be greatly appreciated.
Thank you,
Wailin