thinking about getting into this class how much cheating is going on with the engines? the reason i ask is the price from GM for a short block is cheaper than lots of motors i see for sale on other sites, one guy was asking $8000 just as it comes from GM he just got back from a engine builder that had the legal seal, and he isn't the only one i've seen lots of others, how is this can someone explain? makes me think twice about getting into this class. thanks