Here is how you replace a ring gear on any flywheel
buy the $15 ring gear
Check to see if ring gear is tack welded to flywheel (most are not, some are)
If it is tack welded, cut the welds with a die grinder and cookie wheel
Place flywheel on bench with ringgear down
Block of wood such as a few pieces of 2x4 under the flywheel
Use a torch to heat a 2" section of the ring gear, when that is red hot, use a brass drift and a ballpeen hammer and drive the ring gear off the flywheel
Let flywheel cool, grab a beer
Clean up rust on flywheel land where ring gear was with a wire brush
Put flywheel in freezer for about an hour
45 minutes after the flywheel has been in the freezer, put new ring gear in oven at 400-450 degrees
Then put cold flywheel on bench, ring gear groove up
With welding gloves, pull ring gear from oven and drop in place
You may have to tap it straight and flat with your brass drift and ballpean
if old ring gear was tack welded, then tack weld new one
Enjoy a beer
Install flywheel
Reinstall motor
Align
Install drive
Go boating
