it took me and John Roughly 6 hours to do the install on my car... but we spanned it over a few weeks.... (I have all the safety equiptment and you can't even tell I have N2O (besides the bottle in the back) I would deffinately recomend going with a wet kit (because we don't want your injectors going max duty cycle or anything). Word to the wise... get the Gen X2 kit... it costs more, but it can save your ass. With a good setup, you might be able to even hit high 13's on the spray.... (wouldn't that be something) just out of curiosity, what else do you have done to your car? I have a buddy with a 3.4 and we've done some fairly cheap mod's to his car, and it runs pretty good... (home made CAI kit, cat back, LT1 drive shaft....) If you want help with the install let me know....
on a side note, I haven't heard anything bad about the 3.4's as far as reliability, they are just slow... Sean's has like 160k on it or something and still runs great.