so i haven't been around for a bit but stumbled across this thread and yeah i think i can add a bit.
truck currently: stock sticks deleted and all that jazz, driven regulated fuel, raptor pump pushing the stock system, barder stg 2,southbend dd(awesome), php ficm tuner, play tunes by sinister, php(140x), and gearhead(slr++). fun little set up for sure.
as to my experience, as has been stated before go way bigger than you think on the clutch rating, i have a 1950 cbk sitting in my basement. as for turbos right now i would say my 04.5 stocker with the batmo spooled faster than my barder(lit at like 16-1700 vs pretty much 2000 with the barder, though i have either a bent push rod or two or a unked lifter chewing on my cam, i'll find out in a bit), but this is on stock sticks, also may i add the barder keeps the egts way lower than the stocker, i've had up to 18k behind it running the atlas 40 stacked on the 65hp tow can tune and have yet to break 1300deg.
as far as tuning goes i personally love the php140x stacked on the herculies, but that is a bit smokey.
as for my personal dream to build for a zf6...
throw the batteries behind the seats, spin the manifolds around to face to the front, and in each battery location a compund set up from a vt275... cross the up pipes, a pair of aftermarket full aluminum accura integra intercoolers since they would be the same size as a single stock intercooler, dual hpops, 225/100's, and dual exhausts... wish it would run cool enough to tow heavy with but i'm doubting that.... already set up compunds but twinned... i will build one one day, just gotta sorce some used turbos, the vt275 is either too reliable here in the states or they pretty much only sold over seas...