Hi guys new to the club I need some advice on a 454 marine build. Myse sons have a 24' Searay Sedan Flybridge boat. We are repowering had a 350 255 HP but didnt have enough power to psuh the boat loaded offshore . I recently purchased a 1984 454 out of a 1 ton dually. it has 100,000 miles on it but will roll over so that is the bases for the rebuild. I have a good mechanic for rebuild to help. I would appreciate any suggestions you have as to what I will need to get 300 to 350 HP out of it. I imagine engine is the std. 230 HP choked down with emmisions.It is flooding here or I would post casting#. We are planning on a freshwater cooled engine and saltwater cooled exhaust. The engine will be hooked to a Volvo Penta 280 Outdrive am hoping to go to the DUO prop set up after engine is installed and tested.
Thanks