If you want good Terminator tech without having to wade through all the azzhats on SVTPerf I highly recommend ModularFords.com. Hands down the BEST TECH on the web as far as the Terminator is concerned.
As for your concerns about the intercooler... you should see what one looks like after it has been on the car for 10,000 miles. These cars suck so much exhaust gases and such through the PVC system and back into the intake track that every intercooler I've ever seen is literally covered with oil. I doubt the Seafoam would hurt it. This oil contamination increases substantially once you start over driving the blower with a smaller pulley too.
U.M.