Budget build on the cheap

The LD340 is a really good intake. The Air Gap and Performer are also great intakes as well but even with the technology being newer, they are very little gain even over the LD340.

With the current combination, the 340 cam is the way to go. With more gear and some stall, the 484 works well. The only thing that I think you need is more carb (650-750 range is ideal)...

The 904 only takes around 25hp to run as to where the 727 takes around 50hp to run =904 getting more power to the ground.