I can get the PS'ers in pretty quick now, but yeah they need some massaging. I even got 2 sets with the "expanded" crossover, and still had to weld them to prevent leaking. The crossover bolts are definately too short. They will work, but it's way easier to just go to lowes or whatever to get some longer SS ones. The 3 bolt collector bolts work fine, and don't bother using the supplied paper gaskets...totally worthless!
If you aren't welding the crossover to the y pipe, liberally coat the inside of the Y, and the outside of the tubes before install, and use better band clamps. They are actually pretty decent headers if it weren't for the crappy Y pipe sealing area. The layout is actually the best IMHO over any of the other headers.
Also, you may or may not need to re-route the starter power wire, so you will want to do a trial fit of the front header before you bolt it down (learned the hard way)