i have 14" x 7" rims on my toyota 1987 pick-up.....

the door panel states that the front tires should be 28psi on cold tires
.......................................... back tires should be 35psi on cold tires

but for 14" x 5" rims.......(original size rims)

how do you convert tire pressure for wider rims??? i get a lot of different answers for this from people who run tire stores....or is the pressure the same....??? help .......thanks