[911pcars]

"...unfortunately, these do have remnants of red sealant on them - heat will be a challenge due to their proximity to the rubber bushing..."

You mean the oil seal. That can be replaced. Besides, you're only going to quickly bring the bolt head up to a nice cherry red then strike it to break the seal. I would plan to replace the seal just to be sure. If you want to chance it, strategically place wet cloths around the crank end to act as a heat sink so the seal doesn't overheat. However, it'd be a shame to reinstall the drivetrain and then have a leaking seal allow lube to soak the clutch facing. Still, if it's your labor, it's sort of free. You feeling lucky?

There are few solutions to remove a threaded fastener that's fixed in place by red thread sealer other than a massive amount of torque and/or heat. Without the heat, you need a firm anchor to the fastener in order to apply the torque. Sorry. A lever inserted through a drilled opening through the side of the bolt head better be pretty substantial in size as well as rigidity and length to apply enough torque to overcome the sealer stiction.

Sherwood

My apologies. You're on the other end of the car. I was brain-fixed on the flywheel.