ok I'm having thoughts about my truck now I'm going to buy a 8 inch lift for front and back but don't know if I should get a add a leaf and blocks for back or the full springs I mean I don't know how to add a leaf so I need help on which one I need and I want to put a shackle flip to but ill make my own though and make a 8 inch shackle on front and back and put 40 inch tires. so if I run them tires will I need to put a gear change in the axles and ik I need to put them in bth axles but I don't know if I need to change anything else out plzzz help