O.K. I have a 37 Chevy truck. I bought it with a 327 engine, totally rebuilt. (4000k mi.) It gets 10 miles to the gallon. Has 4 barrel. I am thinking of installing a LS so I can get better gas mileage. Even tho I can afford gas, the low mileage bothers me. Anyone know how much gas mileage would improve if I installed Electronic ignition and EFI on 327? Thanks for any help. Daily driver.
