Re: Good tread front or rear?
If these are going on your Toyota I would put the good ones on the rear and the worn ones on the front. I don't think you have enough weight on the front of your truck to make them wear excessively quick. Plus, if they are worn already, you might as well round the worn ones and keep the good ones square on the rear. Plus with the light rearend that you have on that truck you will need all the bite you can get in the mud on the rear.
Just my thoughts.
'96 chevy 3/4 ton, 5.7, 14 bolt, 4.10, 35x12.5x16.5, 6" Superlift