so on my 89 m20b25 that i just swapped into my 87 e it has two vacuum hose ports on the throttle body that mate with that check valve thing then goes down to the brake booster. i have seen some e30's with only 1 hose would it be okay to make it have only one hose if i have that other check valve? couse i don't have the intake boot that has the vacuum line that goes to one of those hoses.
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