What carb??

Had the 3310 on my 383 Roadrunner back in the day ran 14.0@100 on street tries with stock 383 magnum. Got 16 mpg at 55 with 3.23 gears. With the bigger cam you may need to drill the throttle plates to keep them centered over the transition slots at idle. Properly tuned it should work well. The DP is a good chose if your going to do more racing then street driving. For all out racing the car will probably be faster if you went to an 850 DP. If you have an intake that fits it a properly tuned 850 TQ would be a great choice too.