After reading these posts I feel I need to opine....
1) Generally speaking, the stock engine is good for 450-500 HP over the long haul. Since you are talking about the lower boost kits, you can get pretty much ANY blower kit you want safely without any other mods- so go with what you like. If you are not installing it yourself, go with what your installer likes.
2) Ford Racing sells the non-intercooled Whipple kit through dealerships. If you have it installed at a dealership, your factory warranty is supposed to stay in effect.
3) I also noticed a little mark under my hood (but I don't have the hood liner in there any more) from my first belt. The ony issue I see with Whipple is the 6 rib belt. This is supposedly not a problem with the non-intercooled kit - it's only a problem at higher boost levels.
4) If you want to buy a Whipple but save money, you kind of have it backwards. Don't buy the 10lb kit but change the pulley and not install intercooler... Just have a dealer install the small kit and keep your warranty. If you want to upgrade later, there is a kit to upgrade it that you can do whenever you like.
5) Whichever way you go, I am pretty sure you will be happy. I have never heard anyone say "I just installed my blower, and I hate it". Bottom line is that safety, durability, and longevity are all in the tune.
Remember - Superchargers don't blow engines, drivers blow engines.
