Finnegan and Freiburger put an LS1 in a 74 Rogers on one of the episodes of Roadkill.(google: BoatKill) They ran a Holley TR with twin carbs on it and an MSD6 marine ignition box, ran like a champ. If I could repower mine I'd put an LS in it in a heartbeat. TR or original FI you'll be golden.