Most all the on-line catalogs I've looked at list more than one choice for my '89. Best thing to do, is pull your O2 sensor and write down the numbers stamped on it. then put it back in. This way your car won't be out of service. Double work and a pain in the butt.
Sometimes, if your parts guy wants to, I think he can give you the proper one using the VIN #.
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'89 LX 5.0 - 5 speed. Original Owner
'94 E-150 4.9 Hi-Top Conversion Van
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