I want to get that 3.4 but we'll see how money looks soon. If I get it now it'll just wait in the shop until the 22R dies or winter comes next year; no point of starting a swap in spring... that's wheeling season!
So far most of the swap builds I have found (and have ben shown to me) are the 3.0 to 3.4; not many 22R to 3.4 and damn sure not many for early trucks like mine. One thing I haven't found a reason for when dealing with the exhaust: Why not just run dual exhaust and forget about the crossover pipe?