Looking to lift my 76 Blazer 4'' From reading the forums it looks like BDS or Tuff Country lifts are both good. Blocks in the back are not the best option,and it's explained why. Now....All Spring lift in the back ? or Shackle Flip ? or part Spring and part Shackle Flip??? and Why +'s @ -'s pro's and con's ? Thanks for all the great info !!!