A photo is not really going to be enough to tell.
do you have a part # or source, etc of what you bought?
And again I want to mention that if you are in any size of town with some good truck transmission shops, they can most likely rebuild a clutch disk, and pressure plate, for much less than a new set. And this has the advantage of using parts that you know already work.
I did that several years ago with original De Tomaso parts (yup the PP even has an Isis on it) and have had no problems.
Larry
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