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What's good mpg for 1966 315 hp 390?
I have a 1966 hardtop with the 315 hp 390 engine. I recently installed the Petronix electronic ignition. Everything is running very smoothly but its really sucking up the gas. I'm new to this car and don't really know what I can expect fuel efficiency-wise. Its been difficult finding info about it too! Any ideas?
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