For my 1986 K5 Blazer. It's got a 305ci mill beneath the hood right now but I will be transplanting a 350 into it sometime early 2004. The vehicle is 90% onroad driven, 10% light offroad. I'm looking at the Tuff Country 3" suspension lift (both front and rear springs, no blocks) and their SX8000 nitrogen gas shocks. What would you guys recommend between the EZ Ride and the HD springs for my intended purpose? Tuff Country places a footnote on the HD springs saying that they are best for trucks with big block engines or snow plows up front. Mine will have neither. So is it as simple as that when choosing? Thanks.