Are you sure you're going to need it? If you remove the baffle from the passenger side cover, and do a little grinding on the inside of both covers, it should work.
Also, the 1" spacer could possibly lower the rpm range on the intake 100-200rpm since it is increasing the runner length. I've seen discussions on this before, but I have not seen any proof to back it up. Just something to think about. 
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1989 lx notch
89,000 miles
5-speed, bolt-ons, 3.73, TFS TWs, TFS Track Heat, TFS Stage 1 cam
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