Buy good seals...the ones with the metal spring in them.
If you don’t have a seal driver set you can get by with finding a piece of pvc from the hardware store. I took my seal with me and ended up using a pvc drain cap or something similar that was the exact size I needed to drive them in.
I run 46 in the front and 42 in the rear. Rides fine and seems to keep a stiffer sidewall.
70psi is too much to me. Would be great on a 1 ton with a heavy load, but I'm not hauling anything heavy.