Thinking of A 4" lift on my 96 f-150. What are some of the problems im going to be facing; driveline?, Brake Lines? Sway Bar Drop Down Brakcets? Or would it be better to do a 2" leveling kit with spacers and an add a leaf and a 2" body lift?

 

A properly designed lift kit should include everthing you need. If cost is an issue, I'd go with a body lift and leveling kit.