CNKS is right, if it's a Rockford clutch, the adjustment for the fingers are the bolts with the jam nuts at the outer end of each finger. Look around for an 11RM (9 springs) or 12RM (12 springs) stamped somewhere, which would be Rockford's number for the clutch. It may not be there.
If it is the correct clutch you're likely going to need the IH repair manual specific to clutches to get the specs for setting it up to check out whether it is shot or just severely out of adjustment.
Where you've got it split already, it's fairly easy to check. Bolt it back up to the flywheel just as it is, but use only three bolts to remount it. See if those fingers flop around in and out as a first step. That would be a sign that it may just be out of adjustment.
Use the other three bolts as CNKS described -- you should find three holes in the cover that open into threaded bosses on the rear of the pressure plate. (Scout that out before you bolt it back up. Thread those three bolts into those holes until they are just snug. They will keep the whole thing from expanding when you remove it again.
Then take the clutch back off and lay it with the pressure plate down on a flat surface. The first step is to adjust the three bolts until the under-edge of the clutch cover is 1-3/32" off the benchtop for the 9-spring clutch, or 1-1/32" for the 12-spring. Uniformity is important, so if you can use a fixed gauge of some sort instead of measuring each corner with a stick, you'll get a better result.
Once that's done, use the bolt at the outer end of each finger, and measuring down through the center, adjust each finger until its top edge is 2-21/32" above the bench top. Again a gauge is better than individual measurements for uniformity. The depth end of a vernier or dial caliper with the slide locked down would work well.
If you can get it adjusted to this point, it ought to work. That assumes that it is in otherwise good shape, i.e, all springs in place, no excessive play at the pins that hinge the outer end of the fingers . . . I haven't actually looked at one, but I suspect the clutch service manual will have other specs to help you evaluate the condition and servce limits of the various parts. If there are failing parts, or it can't be adjusted on the bench to the measurements above, it's probably time to just replace it.
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