I am kind of in the same boat (pun intended) as I am unhappy with the perf of the Olds in my new boat, but I know a awful lot is being asked of it to pull a 23ft boat around with the speed I am used to in my 18ft 400cu in Horizon. I have seen at least 3 complete nearly new Olds for sale under $1500. I don't know whether it make sense spend big $$$ to change over. I have always been a Mopar guy and I haven't ruled out going that route either. Does anyone know it I can get 450-500 ft/lbs of torque down low out an OLds 455 for cheap. I don't care about ever seeing 60mph.