MJD, I'm with you. I started this thread asking about the horsepower of an evolution 61nx, and somehow we got on the 60 nx. Oh and the 61nt is the older model, not the nx. Also, the 60 is a 46 case, bored and stroked pretty much. And, I've decided to go with the 61nx, if I don't like it, ill sell it at our yearly flea market, and buy an is 75. Thanks for all the info........I think