sway bar ? which one?

Had nice day here yesterday and supposed to be nice today too.Took it for a ride and can't believe the difference the bar and valve mod made.I put a cheap reman box in it and I thought it was junk,but it firmed right up.But I do have 1 question,can I add more of a shim in the valve?Will thise screw up my pump?I would like the power steering to feel more like power assit.Eventually I'm going change the box to one from Steer n Gear since they're only a couple hrs from here.I figured I'd take a ride and save the shipping.