I disagree only based on the dyno test's I've seen as where a stock 5.9 with the beer barrel intake vs. one with the dual plane MP intake made the same power. And both had headers on the dyno. I think the stock cam is in the lift and duration range of a broomstick, and anything added to the motor will have a marginal impact on power.
Might make 310 or 320 with your suggestion, the RPM intake is better than the MP, but without a cam upgrade I think you are hovering around 300 hp and getting little return on the parts.
Now, swap a mild cam into it, even something as small as a
[email protected] cam, and it makes a big difference. The one test I saw lost nothing down low and picked up 500 rpm and over 50 hp. Now you are making over 350 without breathing hard.
Lot's of potential, but much beyond the stock components and the cam throttles it.
