Would that be tough enough with hot oil sloshing around and fair bit of torque? I can produce an AutoCAD drawing if necessary.
It is quite tough stuff although it doesn't have the fibres through it like tufnel and it's the only non metallic stuff I've got in my garage. Worse case scenario is it would probably crack across the "keyway" section, but it's maybe worth a try ?
AutoCAD, I'm more the "back of a fag packet" type As long as I don't need the programme to open it I should manage. I've a lathe and mill in my garage and been involved in engineering and "making stuff" for over 40 years.