Having a tremendous amount of experience installing everything from small 2.1 kb's all the way up to the newest prototype 4.2l kb, from a basic bare bones non ic vortech to an f1 with huge custom a/a intercooler, and everything in between. I will say that hands down, speaking in terms of bolt on kits that are not custom built, a procharger is the easiest blower to install. I am yet to install a paxton on a new 5.0, but from what I have seen the paxton is the worst performing centri kit on the new 5.0. The biggest advantage to procharger, is the ability to easily upgrade later to a larger blower for a small amount of money. I have seen a new 5.0 make over 800 rwhp using a p1 with a small intercooler sprayer on a terrible air conditions day. One main advantage to a centri with a/a intercooling is the ability to perform back to back hits without the major heat soak and power loss as with twin screws or centri's with a/w intercoolers.
I would be willing to go out on a limb and say that at least half the cases of blowers coming apart or troubles with blowers, are the owners not changing the oil in the headunit. It is required to change the oil every 6k miles using only the recommended oil. IMO there is 0 excuses to over spin a blower. If you are at or near the limits of the blower impeller speed, upgrade to the next size blower or stick to the same power.
Turbos are another great power adder, but with that you run into problems with heat, and troubles sometimes finding a good location to route the pipes. Turbo kits are almost always the most difficult power adder to install. Having built simple bolt on kits all the way to full on custom twin 1000+ rwhp cars, personally I am not a turbo fan. For all out power and drag, it is a great power adder.
I hope this brings a little insight to the thread, and answers a few questions some of you may have!
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