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What does a 318 "on the street, all throttle, pump gas" have to run in a estimate 3100 A-body in the 1/4 mile before you say "That's a Killer 318" !!
3100# with 400 hp will get you to 11.53 @ 117 mph. 400 horse is fairly streetable and easy to get to.

Your ET / MPH computed from your vehicle weight of 3100 pounds and HP of 400 is 11.53 seconds and MPH of 117.24 MPH.