Stock boost should be about 13.4 if I recall correctly (the spring in the wastegate tends to get weaker and go into the 11s or so). The ALDA can accept upto 17psi but I wouldn't recommend taking it that high.
Here is a thread about intercooling. The problem with intercooling is that unless you take the ALDA off and adjust the max fuel flow setting you won't gain that much if anything. Really since the cooler air creates pressure drop and the ALDA senses manifold pressure it could create a power loss unless compensated for. It will however lower the EGTs and your engine aught to enjoy that. If you do decide to do performance mods please do some testing beforehand then again afterwards so we can see what you actually gained from doing what.
That sounds like a fun CTD.
