You need to give a little more info than you have. Are you tring to use the stock frontend?? Is the truck lowered?? 3degrees wont hurt a thing with a leaf spring truck.It is better to have a little more than have the pinion at 0 or up. Is the bed on the truck?? Do you know the rear is mounted correctly?most are not thats why the owner loses interest and gives it away. You need to put the cab and bed on the truck.Check the wheel base(make sure the rear wheels are centered cause they are NOT stock and look pretty stupid) and decide how high /low the motor will go in the chassis.Along with master cyl location, exh,and crossmember issuies. Got lot of pix but cant post them anymore .So.......... go look at one thats done. If your using a stock frontend you have a bunch other problems anyway.