To run carb(s) I would suggest to get allante intake bottom.Fabricate runner section allow for adjustment of runner lenght it's important in terms of performance.Fabricate plenum and base for carb(s) to mount on, from sheet aluminum.Volume or size of plenum is also important. There will alot of trial and error to get it right. This was how the original sbc tunnel rams were developed using the FI manifolds in the 50's were made.