AFMless ecu options

as the title states thinking of purchasing an intake manifold (+other goodies) with 4 separate trumpets so wont be any room/place to have an afm what are my options? (i have gen1 NA sw20 mr2)

i heard that you can make up some trumpets what ecu do you suggest your customers running this setup use?

Do i just need an aftermarket ecu? what products would be able to do this? Do i need some type of air flow sensor(can't see where it would actually mount/be drilled in though)?

Cheers