There shouldnt be that much torque on the flywheel bolt.
Once you get if off, you're gonna have to give it a whack on the crank while wedging a pry bar under it to release the flywheel.
'84 190E 2.3
'83 Porsche 944 (track car)
'84 Porsche 944 (parts car)
85.5 Porsche 944 (sled)