Instead of selling the car, take the opportunity to do a full rebuild!
I think this is a great example of people not understanding the world of racing and power upgrading...
If the car is your daily driver>
Dont touch your engine unless you can afford to fix worst case scenario dissasters that could arise from the upgrade! What makes people think that injecting METHANOL into the engine isn't risky business?
I have posted this in the diesel section, but lessons can be learned from my install that you can apply to ANY vehicle during an install.
http://proudhistory.blogspot.com/
There is a picture on there with a nozzle being threaded thru an intake component... notice the alignment of the screen?!