although i install new bearings with the pressure plates i powdercoat, i've had stockers drive out with really minimal effort and they look more than fine to reinstall.
but i bought a stack of bearings in bulk so it's really not worth risking it for other peoples' parts.
to get that pushrod pin out, if it doesn't come out with the push of a finger, lay the pressure plate flat face-side-up on a workbench or floor whatever... and use a 3/8 drive socket extention as a drift to tap it out. it'll definately come out before the bearing does. to install in the next bearing, smear some grease on the outside and tap it in with a ballpean hammer.
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additional note,
oh yeah... remember when you install the next plate (or reinstall this one), to make sure the alignment's correct. the stocker's got a hashmark on one of the spring wells that aligns with a hashmark on one of the clutch hub spring-posts. the aftermarket bit should have something similar as well.
another note is for the spring retention bolts... use a dab of blue locktite and ONLY HAND-TIGHTEN THEM... screw them in until they bottom out and that's it!!! you'd be surprised at how LITTLE force it takes to snap those suckers...