Custom manifold/plenum/TBs

BGTV8

Take a peek at the Jenvey site in the UK .. here:

Throttle Body Selection with Jenvey Dynamics - Jenvey Dynamics

There are a plethora of factors that influence induction system design, none-the-least of which is intake runner length - for an NA engine.

There is no doubt that longer runners generally improve torque and shorter runners improve throttle response, so that is trade-off #1

There is also the trade-off between ultimate power at 9 gazillion rpm and the ability of the induction to support optimum engine acceleration at or around peak torque

If you are not already familiar with induction system design, I suggest you prepare to spend a significant time on the web researching.

The other point is that the induction for a full-race engine will be a pig on the road - it will p155 and f4rt on the road and generally not be tractable, BUT it will howl like a banshee between peak torque and peak HP.

The other extreme can offer monster torque in the low/mid-range but have the engine fall off a cliff when the rpm rises.

Be prepared to do lots of work on the dyno unless you have access to CFD tools and can map your chosen design to do the research in the virtual world.

None of this stuff is simple !!