31ft predator cat, twin 454s one is blown, block needs replacing. merlin grumpy jenkins heads. heads are rebuilt. arneson surface drives 1:36 ratio. new interior, nice shape. hydraulic steering. stainless k plane look alike trim tabs. 2002 myco triaxle trailer. the guy says hes got 60 grand in this boat 10 years ago. wondering how these boats work and if they are well built.