I just finished a LS swap into a 1987 K5 Blazer, I drove it for the first time this past weekend and found that I do not have power steering at idle (idle is erratic as I just have a base PCM tune). I installed a 6.0 L out of a GMC 2500, which had a hydro boost. I installed a stock GM hydro boost into the truck with the stock steering box and the stock power steering pump that came with the 6.0L. Does anyone know if there is a smaller pulley I can install on the power steering pump to get the RPM up, once I start moving the power steering seems to start working properly. I am still breaking in the motor so I don't want to take for any extended rides yet.