Search on here for posts by MYMC regarding the 8.1 He's not here anymore, but he is a former MC dealer and a professional engine builder. If you put in the time, you will find answers to all of your questions, with substantiation. Not rhetoric, propaganda, or anything else. My take on everything I read over the past 6 years is that there is no way I would want less of an engine in a boat of that size given the opportunity.
'97 Prostar 190 - LT-1
Prior boats - 2009 X14, 2008 X14, 2005 197, 1988 Tristar 190, 1989 Prostar.