i had this setup in my car.. bigport 16v 264' cams with adj gears (so they say) Ae111 quads but it was running an SAFC from Japan and stock BIGport ECU.
all vacume lines fed into a small plenum then 2 feeds out of it.

it had no vacume lines hooked to the vacume sensor, it went to the charcol canister behind the front drivers headlight.

i hooked it up to the vacume sensor one day and the idle went all irratic so i just disconnected it and put it back how it was.

it always ran rich.. but now im putting the motor into a ke70.. i am debaiting weather to go the stock ECU now that i hear it can be ran on the ecu alone.. 90 rwkw sounds nice.

it would be alot cheaper to.

Frak was it just a matter of dialing in the cams?
i might throw it in in the next few days and see if putting a plastic fuel filter in the line for the vacume feed