I believe the Heavy Duty clutch uses a pressure plate that is rated at 1200 lbs.
I have some much better pictures of the clutches and their kits, so soon I will be updating the clutch page next. We sale alot of those clutches and people tell us that the work really well. Marlin has been running a Heavy Duty clutch for along time and the pedal still releases pretty low and it still grabs like new. This has got to be because Marlin builds these kits using super strong and reliable clutches that feature "double spring" (a small high torque spring inside of a larger outter sping) X 4 instead of using like 8 urathane bushings, or 6 bushings 2 springs, or 6 single springs. Check the picture below, the springs are pretty massive, and that's just the outter spring
Regards,
BigMike
