I currently have 4" Tuff Country HD front springs with modified zero-rate type blocks on my 69 K20. I'm presently using Tuff Country SX8000's. The front end of the truck can get pretty bouncy. I'm in the process of making changes which include replacing the 307 with a 454 and I have ordered new 6" Tuff Country front springs to get rid of the front zero-rate type blocks. I'm interested in a shock that might help control the bounce a bit better and I figure now is a good time to change out the Tuff Country's front shocks. Any opinions on the Rancho RS9000X's or suggestions of other shocks to consider somewhere in that price range (about $85 per shock)?