Intercooler Options

[freestyler121]

I have my 3sgte in, waiting for the wiring harness to be fixed. I'm about to get an intercooler. Talked to soem people and they said too big of an intercooler can do more damage than good because it takes too long or it gets way too cold. Too small wont allow enough air to get cold. For a front mouth intercooler, how long, how thick more importnantly and how high should one be, saying if i run it at stock psi, with minor mods.