If given the choice I'd take the P-5 over the P-8 in almost any circumstamnce. The P-8 on a country run is as bad as it gets for a driver. It's terribly underpowered for use on two-lane highways even when near empty and when fully loaded with business pick-
ups the problem is that much worse.
As a result of re-looping, the few country cars that had newer adequate vehicles were eliminated and now most of the areas have been dumped on drivers all stuck with those dinosaur P-8's and P-10's that on many occasions can't get into the long driveways and be able to turn around for a safe exit like the P-5 or a P-7 could. I can remember when I started at this 10 yrs back and everyone wanted one of those high mileage extended runs, but not anymore. Too big and too slow with too much weight out in the country is too much of a liability.