O-ring groove in flywheel housing

[Ford-A-baquet]

I tried to align the flywheel housing with the crank. Without
papergasket it`s easy to proceed the job, set from BILL BARLOW.
Shimming here, shimming there, after 30 min. the job is done.
Instead of using now the thick paper gasket I apply a string of
silicone sealant the whole length of the sealing surface, place
correct O - ring in the groove milled in the flywheel housing
opposite the rear cam bearing, six screws are properly tightened
to the correct torque. So the rear cam bearing is impossible to
start leaking.
Received the housing today and yes ---- I am happy
Someone already knows this improvement ???????