1/4" toed in. I don't trust your method, tho, because it assumes the track of the vehicle is the same from front to back, and I don't think that is so. The rear track is less on our trucks than the front, which would then make you toed out. You should use a tape measure on the front and back of the front tires to set the toe, or you can get a toe bar from Harbor Freight for about $20, which makes it easier to do by yourself (otherwise you need another person to hold the tape measure).