After all that, added, how much power would you be seeing?Alright, you might need a little more money to build it right...especially if you want to port the heads.
The cam's you are looking for for the 3.4 w/ FI are found here:
A.R.I. Engines GM 60-degree V6 - Stock & Performance Camshaft Kits
The way to build this engine to the maximum is doable (and fairly cheap), but probably a little bit more complicated than a novice should undertake...
That being said, the laundry list is as follows:
Heads and intake manifolds (upper and lower) off of a 3400 V6 FWD
3400 throttle body
3400 head gaskets
3500 intake manifold gaskets
19# or 22# injectors off of a Grand Prix (depending on power output wanted)
3500 heads and intake are a little better, but are A) harder to find and B) are a tight fit on a forth gen to shut the hood...
I've been looking into getting pistons re-cut to lower CR a little more as the motor above will have around 12:1 CR
These engines have been known to put out a ridiculous amount of power but don't get much love among the LTx/LSx crowd, lol