[eschaider]

Build an equal runner length fabricated aluminum manifold with a suitably sized plenum, have it welded up at a local aluminum welder's shop and use a 90mm throttle (or larger if you want), pair it up with a good EFI. You will not be able to improve on the air or fuel distribution that the project provides you and you will be able to use a 'normal' camshaft. You will also permanently scratch that itch you are experiencing over uneven air supply to adjacent cylinders and do it the right way.