NEVER put a 750 on a 318........
Mopar put 800cfm carbs on 150hp smogger 318s. GM put 750cfm carbs on 4.3 and 4.1 litre V6 engines, in heavy cars with tall gears!
I drove a truck with a 750cfm carb on a 370ci engine that never topped 3500RPM.
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