Here you go:
Another school of thought is that you should inflate the tire such that it has uniform tread contact with the road. This can be determined in a number of ways. The easiest is to try to slide a thin card under the edge of the tread. Inflate the tire until you can just get the card under the edge a little bit. A more involved check is to place a chalk line across the tread face, drive a short distance straight ahead on a smooth surface and then observe the chalk line. You are looking for it to be evenly worn off the tread. Another variation is to measure the length of the contact patch and make it even front and rear. This works well on vehicle where the rear load can vary, such as a pickup and especially if a recommended pressure is known for the front end. Slip a paper sheet under the tire to stop at the leading and trailing edge of the contact patch, measuse the separation of the two sheets (making sure they are parallel). Then set the rear pressure such that the length of its contact patch is the same as the front.
'78 CJ7 -- Chevy 350 SBC, Holley 4-BBL, TH700R4, B&M Performance Shifter, Dana 300 w/ Twin Sticks, 3" Shackle Lift, 3" Body Lift, D30 Front (Disc), AMC 20 Rear w/ Moser 1-Piece, 4.10's, 35x12.50/15 General Grabber MT's, Cragar Soft 8's (15x8 w/ 4" BS)