Cheapest Drop Spindles/rearend

[mcmullinauctions]

What is the cheapest drop spindle setup. I am going to swap out my crossmember and everything for a 1978 chevy 5 lug but I still want to lower the front about 2 1/2 inches and the rear around 4. I want a slightly lower stance but I want to still be able to drive it anywhere without worry. I am an insurance agent and do ALOT of driving (around 25,000 miles per year) and intend to make this a daily driver. I have found a 3.08 posi rear end out of a 95 camaro that I am going to look at this weekend. It is supposed to have disc brakes as well. Has anyone used this type of set up? i also can get the 5 speed stick trans out of the camaro as well. Any thoughts on this tranny for good gas mileage. My goal is to get around 20 MPG when all is said and done.