The only "marine" injectors I hear people talking about are "marine 370's."
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'91.5 D350, 2wd Dually, 4" Straight Pipe, 366 Spring, DennyT Stage II Fuel Pin, Isspro Boost, Pyro, Tranny and Fuel Pressure Gauges
Brothers: '97 2500, 12 Valve, 4wd, 5spd, 716rwhp, 1200+rwtq, Single turbo, Fuel only