LT1killa

I am about to start on a new car (to me) and I was wondering what the suggested specs for going turbo. I am shootin for 250whp to start it off. I am gettin a LS teg with like 150K and gonna rebuild it and I need to know what is the best to buy as far as what is a comp ratio to go with I was lookin at some JE 9.6-1 should I go lower?? also should I keep the stock crank??? I figured Eagle Rods but where do I go for the specs on that. I searched and went to Crower.com but it didn't help.

Oh and I am probaly gonna go with a Drag or Greddy kit