/6 to V8 questions

Thanks everyone for the help and kind words about my Duster. I love this car and the Forum is a blast. The forced induction is beyond my capability. I know how to wrench--but that work is above my payscale. I noticed that Clifford offers a kit to replace the intake with one that will accomodate a 2 or 4 barrel carb. They also provide an exhaust header set and Weber carb. The kit is $1300 and they say it improves power by 60%! Wouldn't this be the easiest and least expensive fix? Anybody gone this route? If so, what is the maximum flow rate carb you could put on this intake/engine combination? Thanks again.