Are there any tips to removing the clutch pressure plate? It seems the screws are in at super human torque levels. My JIS screw driver gets a good bite on it but I just can not get enough leverage on the screwdriver to get them to break loose. O tried looking for JIS socket but no one seems to make any

Hope they've not been loctite'd in as is unnecessary. If i had to i'd use a T-bar with a nice new sharp [not twisted or damaged] impact tip in so it won't slip out easily. Don't impact it but T-bar twist should break it free easily. Turning to the left of course facing it!!.

I hadn't been pre-warned not to use an impact driver, so that's what I used. Just the kind you hammer. I don't have a JIS tip, but I have a number 3 Phillips tip that fit the bolts very well.

I subsequently took the clutch apart again, and that time I just used a that same Phillips bit, with the ratchet handle. The first time I took it off, the screws had been on there for 50 years.