8 inch lift

[84TonkaToy]

I have a 84 chevy stepside with a four inch suspension lift and a two inch body lift. Im looking to go to an 8 inch suspension lift. first off.....would it be smarter to run 8 inch springs? or do one of thoes shackel flips and do a 6 inch ( because i think it said it would add two inches) in the rear and 8 in the front. then... is there any major mods i would have to make because of the lift? i would drive it on the street every so often. thanx!