One easy way to undo the bolt is put a bar and socket on it, lean the bar back against the bulkhead and kick the starter, WITH THE COIL H/T LEAD OFF.
To align the seal properly with the crank on assembly, fit the cover and gasket, do bolts up loosely. Fit crank pulley temporarily into seal, wiggle the cover on the bolts, then tighten them. Remove pulley if needed to get to the bottom ones.
If you don't do this the seal and pulley may be misaligned, then the seal will leak before its time.
To hold the motor while tightening the bolt, select 4th gear then have someone hold the brakes on HARD.
BTW I no longer fit those crappy locktabs, I use Loctite 262 on the thread instead. Never had one come loose since.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
