i used a blow dryer to heat up the sticky stuff an they popped right off, i worked at a body shop for a while an that is how we did it there except they had some special blow dryer thing that got real hot real fast.
i waste tons of money on gas because i like driving it so much, i just go drive around for the fun of it. if someone tries to pick a fight or talks "$hit" or anything stupid like that i stay away from it (which is smart anyways) in fear they might do something to my car, thats how people are in...
if the price is around 500 bucks, its for one head, if its for a over 1000 its for a pair, thats how it usually works in most cases. if its the gt40 turbo swirl heads, those are about 500 each
i remember the guy who scammed you saying if anyone stopped by his house he wouldnt hesitate to use force or something crazy like that, dont remember if he mentioned a gun or not.
spark will be weaker, and i personally dont think it will make a difference by unplugging it, what will make a difference is bypassing your a/c and smog pump with a shorter belt, try that.