I would put two Holley # 1850 600 CFM vacume secondary carbs. on it and run them in line with non progressive(staright one to one) linkage so your running it on both carbs. primary barrels at cruise, just like running to two barrels at low speed Everybody out there thinks SB Mopars are like SB Chevys and Fords There not You have to remember that the right foot controls how far the throttle is opened and how fast it is opened It is always better to have to much power than not quiet eneough, correct As far as the fuel system look at your stock fuel line and pick up in the tank, if they are the stock non HP 5/16 O.D. consider changing them both to 3/8 and then run a very good(200 GPH + ) electric pump mounted at the rear below the the pickup in the tank The better electric fuel pumps need a good fuel regulator also, I like and use Mananfuel now Put a 80 + micron fuel filter between the tank and the pump, if you really want to be safe on the fuel filters add another one between the pump and the carbs, a 10 micron unit