Nice setup. I've toyed with the idea of adding water/meth injection to my setup as additional insurance (I assume you aren't using straight meth). Are you using a kit or a homebrew setup for the alcohol?Regarding head gaskets I run 7-8 PSI boost (older Eaton m-65) with a Rienz gasket on a stock compression 86 2.0L with no problems in 2500 miles. I used an air to air inter-cooler from a 75 turbo because I had it and later added alcohol injection to address pinging. if I were doing it again i would skip the inter-cooler and go with the alcohol only.