I'm using an adjustable regulator for my power rack and Jeep SRT8 PS pump. Can't think of the brand and it's stored away for now, but I'm sure you could Google it. When it comes down to it, I may get a non power rack and try it with an idler. If the non power works good enough, I may not use the power stuff I've already mocked up. That would tidy up my engine bay a bit, even though you really only see the pump.