Totally doable. Listen to Mike the Mopar "Whisperer" from MRL. Solid flat tappet in an LA is a good choice especially If your going new pistons and can get the compression up a little. What new top end do you have? Stock heads reworked? Aluminum heads? Intake? Nicely prepped heads and an air gap or rpm intake and Holley or Quick Fuel 750'ish carb will get you there no prob with a good cam. Devil is in the details...