87 G50 with a newly rebuilt motor , i have gone through 3 different starters , and 2 ring gears , still the same crunching noise every time. Clutch and flywheel set up , all OEM , very smooth , very engaging.. Checked the flywheel # , per Porsche dealer is correct

First starter OEM , had it rebuilt
Second , new Bosch s68x Part #
Third , High Torque from our host , also the new second ring gear
I do not want to just keep throwing money at the problem , i can get new clutch kit ,
I,m not sure it will fix the problem.
Any help would be appreciated , i,m at a loss for answers here..