Hi Everyone, We are looking at an 82 Post SF. The broker lists the engines as DD 6-71 TI(s) rated at 410-hp. In researching the boat I see that the Powerboat Guide listed a 410-hp 6-71 option for the 42 SF in that model year but they don't specify an engine model; N, IT, TA, TI. However, when I attempt to research the engine itself, I can find nothing on a 6-71 TI rated at 410-hp. Everything I've been able to find related to the 6-71 TI for that model year rates it at 485-hp and it appears that the 485-hp engines were not offered in the 42 SF; only the 46. The 42 SF in 82 appears to have come standard with 6-71N(s) rated at 310-hp. I believe that the broker simply copied the information from the Powerboat Guide into his listing but before I begin to question the accuracy of the information he's presented I wanted to be sure of my facts. As an aside, when you run this boat on the NADA site the only engine option it allows you is the 6-71N(s) rated at 310-hp. Any additional information that anyone could provide would be greatly appreciated.