I have both an Intercooler and Alky on my car. I like both. The Intercooler worked fine as is on my setup, but I wanted an all time race gas setup + even more timing, so I did that too. I think Alky is a good mod with or without an IC. An Alky kit works better than most think. Pending the setup and mixture it can cool the air better than some IC systems. I think before even considering Alky you need a minimum of a Scanner, Tuner, and a Wideband gauge.
My advice, if you're going the IC route, go all out or don't do it at all. Get a full sized, don't dick with an SSIC. There lousy to begin with even for a stock GP IMO. A very disappointing mod indeed (yes, I had one on my other GP). Also, get a good IC pump and a nice and big FMHE. Also, i'd invest in a reservior too. If you want your IC to actully work right and work good you need to consider all the above.
Also, IMO combing an SSIC with ALKY is pointless too, the Alky will do all the work. If you going to cheap out on your IC setup, just get the ALKY and set it up correctly. Thats my opinion.
So to sum it up...
Get a Full Size IC and set it up right
Or
Get Alky Inj and set it up right
Or
Do both
And
The SSIC sucks