Pressure plates in my clutch collapsed, whats the best method for doing a clutch on a d1 standard.

 

The manual says remove the engine, but I chose to remove the gearbox because it seemed to be easier. Having removed both, I think it's a toss-up which you remove.
If you remove the gearbox, making the gearbox support shown in the manual is a huge help.

 

I'm looking at this prospect here soon as well. My clutch is beginning to slip under heavy throttle.