Q: on Manual Clutch Assembly

[Bierkan]

I'm running into an issue installing a hydraulic throwout bearing for a stock application into my chassis. I'm measuring about 1/4" interferrence fit between the clutch fingers, throwout bearing and the transmission.

Since this truck has a questionable history (very cobbled together over time), I do not know what friction plate/pressure plate combination is in it.

Would a heavy duty pressure plate be thicker than stock? Is there a visual way to tell the difference between stock and heavy duty pressure plate with the cast bell housing installed and the dust shield removed?

Thanks in advance for your help.