Ebax Welcome to the socal boards and Jetboats ,not sure I caught what was motor in the boat prior but the BBC from the truck should be fine for a "starter" powerplant , if your starting from "scratch" the parts you need to "Marinize" the truck mill are around $1k to $1500 if you gather a combo of new and used pieces to make it work,(we do and "assist" these all the time) . You will need: a drive line ,PTO, exausts (manifolds or headers) motor mount system (4 pt ,3pt or rail kit) an oil pan (debth cannot exceed 7 3/4 in at the rear pan rail (sometimes 8") ,water inlet plates and water outlet divider,as well as some other misc "this and that" . These things along with a running BBC and some elbow grease will put you in the H2O. You will get lots of coaching and help from the folks here and We (JBP) are also happy to help you anyway we can. Feel free to call or post up questions as they arise Tom