Take it to a auto parts store and ask to see one from year you need and see if it matches, if you can not do that then just buy the correct year for it.
I bought wrong year clutch and pressure plate online already. It's just a junk truck to run at fairs.
I guess you can pull yours and compare or still check at parts store against the year & model yours is.
If the clutch you have works with the 1990 truck it would be cross referenced.
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