I see. Definitely do not want any Mickey Mouse engineered setups holding the axle in.
With the stock setup, the rear wheels should sit roughly 2" forward of the fender centerline. I have heard of some reversing the springs with an open driveline swap to center the axle in the fender opening for appearances.
For the shocks, you might take a look at Gabriel. I've never used their coil overs personally, but I have used their HD truck shocks on my own vehicles and installed more that I can recall on customer vehicles. Good products. If they don't have a listing, you might be able to take the dimensions and match them up to a similar sized shock with the same mounting system. I have done that in the past with vehicles that were raised/lowered for customers.
