Marine Chevy big block 454 First Start

CBB first start (since dyno a few mo. ago) 454 .060 over to 468 (7.7 L) roller rockers, all forged internals, SRP 10:1 forged pistons, GM performance heads w/ inconel valves, Sea Demon 830 carb, Stainless Marine exhaust. Going in a 24’ Donzi Black Widow,