I run P-metric's on my '37, no loads, just empty bed, total weight around 3400 split even front to back. Front tires 205/75 R15 set to 30psi, rear 235/75 R15 set to 28 psi, it rides good with the lower pressures. I keep the fronts a little higher to help low speed turning, but out on the road 28 psi front works just as well.
Load E will ride rough no matter how much air the have. We run a lot of them at work on school buses, the side walls are thicker then my P-metric tread!
