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Thanks for the response. So I get that a lift and suspension travel are different. the only reason I'm mentioning the lift portion of things is that if a lift(bracket style) is possible, then the increased a arm/cv travel is possible, then shocks with increased travel would be an option. But it seems like the lift may not possible with these machines, which is pretty much shutting down the idea of shocks with increased travel, unless more travel in the upward direction is an option.So, I'm no expert on the P5s by any means but.....adding a "lift" and suspension travel are 2 different things. From what I've read from you posting here, seems you're associating one with the other. A lift will give you added clearance, whether under belly or wheel well, it's just a clearance issue. You're wanting to add suspension/wheel travel but unless you modify either the a-arms/mounts/axles AND shocks...... So like hot shot trigger mentioned, your stock set up will always be limited to your current design, mainly because of the CV.
I think you should find someone near you/local with a P5 and upgraded shocks and ask to take a ride. Like everyone that's upgraded shocks has mentioned, you'd be surprised at the overall difference.